9+ Reasons Why I've Never Been Called for Jury Duty?


9+ Reasons Why I've Never Been Called for Jury Duty?

The absence of a jury summons can be attributed to various factors inherent in the jury selection process. Eligibility requirements, database limitations, and random selection methods all play a role in determining who is called for jury service. Potential jurors must meet specific criteria regarding age, residency, citizenship, and criminal history. Failure to meet these prerequisites renders an individual ineligible. Furthermore, the source lists used for juror selection may be incomplete or outdated, omitting eligible individuals from the potential juror pool. Finally, even among those who meet the eligibility criteria and are included in the database, the selection process is typically randomized, meaning that a lack of summons does not necessarily indicate an error but rather a result of chance.

The importance of a diverse and representative jury pool cannot be overstated. Juries are intended to reflect the demographics and perspectives of the community they serve, ensuring fairness and impartiality in the justice system. Historically, jury selection practices have evolved to address biases and underrepresentation. Understanding the reasons behind an individual’s absence from the jury pool is crucial for maintaining the integrity of the system and identifying potential areas for improvement. Examining the demographics of those who are frequently called versus those who are not can reveal systemic disparities and inform strategies to enhance inclusiveness. This ensures a broader range of voices contribute to the judicial process, fostering public trust and confidence.

The following sections will delve into the specific eligibility requirements for jury duty, common reasons for exclusion, and the methods used to compile and update juror source lists. Additionally, this exploration will address steps individuals can take to ensure their information is accurately represented in the relevant databases and discuss resources available for those seeking more information about jury service.

1. Eligibility Criteria

Eligibility criteria function as the primary filter determining inclusion in the pool of potential jurors. These requirements, mandated by federal and state laws, typically encompass age, citizenship, residency, English language proficiency, and the absence of a felony conviction. Failure to meet any single criterion automatically disqualifies an individual from jury service, directly contributing to the circumstance of not being called for jury duty. For example, an individual under the age of 18 is ineligible, regardless of their civic engagement or desire to serve. Similarly, non-citizens are excluded, even if they are long-term residents and taxpayers. This creates a direct cause-and-effect relationship: non-compliance with eligibility standards results in the absence of a jury summons.

The importance of these criteria lies in ensuring a fair and competent jury. Minimum age requirements are intended to ensure jurors possess sufficient maturity and understanding to weigh evidence and render informed verdicts. Citizenship requirements underscore the principle that jurors should be members of the political community whose laws they are judging. Residency requirements connect jurors to the local community and its values. The absence of a felony conviction aims to maintain the integrity of the justice system. English language proficiency, where required, enables jurors to comprehend courtroom proceedings and evidence presented in its original form, free from potential interpretation biases. Without such requirements, the impartiality and accuracy of jury verdicts could be compromised.

Understanding the connection between eligibility and jury selection is practically significant for individuals seeking to understand their lack of jury summons. Individuals uncertain about their eligibility status can consult state or federal court websites for detailed requirements. While there are opportunities to update voter registration or driver’s license information, which often serve as source lists for jury pools, actively ensuring compliance with eligibility criteria is paramount. It is important to note that fulfilling other requirements (such as residency and age) does not guarantee a summons. However, understanding the role of these criteria provides clarity regarding the foundational aspects of the jury selection process. The interaction between eligibility and other factors such as database accuracy and random selection is required for selection of jury duty.

2. Database Accuracy

The accuracy of the databases used for jury selection constitutes a crucial factor influencing the probability of receiving a jury summons. Jury pools are commonly derived from sources such as voter registration records, Department of Motor Vehicles (DMV) databases, and state income tax rolls. Inaccuracies within these source lists, including outdated addresses, incorrect names, or omissions of eligible individuals, directly contribute to the circumstance of not being called for jury duty. For example, if an individual has moved and failed to update their address with the DMV or voter registration office, their jury summons will likely be sent to a previous address, effectively excluding them from the selection process. The cause is inaccurate data, and the effect is missed jury duty notification.

The importance of database accuracy stems from its impact on the representativeness of the jury pool. If source lists are incomplete or contain errors, certain segments of the population may be systematically excluded. This can lead to a jury pool that does not accurately reflect the demographics of the community, potentially compromising the fairness and impartiality of the judicial process. The use of multiple source lists intends to mitigate these inaccuracies; however, it is important to identify any overlapping source lists. Therefore, inaccurate or outdated information is a significant factor in “why have I never been called for jury duty.” The practical significance of understanding this connection lies in recognizing the individual’s role in maintaining accurate records with relevant government agencies. By keeping personal information up-to-date, citizens can increase the likelihood of receiving a jury summons if they meet all other eligibility requirements.

Efforts to improve database accuracy include regular data matching, address verification programs, and public awareness campaigns encouraging individuals to update their information. However, challenges remain in maintaining complete and error-free source lists due to the mobility of the population and the decentralized nature of data collection. Ensuring the integrity of these databases is a continuous process vital to the fairness and effectiveness of the jury system. Accurate databases are pivotal to guarantee all the demographic and community profiles of people will be equally called for jury duty.

3. Random Selection

Random selection, a cornerstone of jury selection processes, significantly influences the likelihood of an individual receiving a jury summons. It is a method designed to ensure that every eligible person within a jurisdiction has an equal opportunity to be chosen for jury service, mitigating bias and promoting a representative jury pool. Understanding its application is essential to comprehending the question of why an individual might never be summoned.

  • Statistical Probability

    Random selection implies that each eligible individual’s name is entered into a pool, and a subset is drawn by chance. The probability of selection is therefore determined by the number of eligible individuals in the pool and the number of jurors required. In large jurisdictions with extensive populations, the statistical likelihood of any single individual being selected in a given year is relatively low. Consequently, the lack of a summons over a period of years is statistically plausible and does not necessarily indicate an error or exclusion. The sheer volume of eligible candidates in a county or state makes selection a probabilistic event.

  • Selection Algorithms

    While the concept is simple, the implementation of random selection often involves complex algorithms to ensure fairness and prevent unintentional bias. These algorithms typically use computer-generated random numbers to select jurors from the source lists. However, the integrity of the algorithm and the quality of the random number generator are critical. Any flaw or predictability in the algorithm could inadvertently skew the selection process, increasing the probability of selection for some while decreasing it for others. Despite these complexities, the goal remains to maintain a fair and unbiased selection process.

  • Infrequent Jury Trials

    The number of jury trials held within a jurisdiction directly impacts the number of jurors required. In regions with a relatively low volume of jury trials, fewer individuals will be summoned overall. This scarcity of jury trials, combined with random selection, further reduces the likelihood of any single individual being called upon. Economic downturns, changes in legal practices (such as increased plea bargaining), or shifts in case management strategies can all influence the frequency of jury trials, and therefore, the demand for jurors.

  • “One Day or One Trial” Systems

    Many jurisdictions have adopted “one day or one trial” jury systems, which aim to minimize the burden of jury service. Under this system, individuals who are not selected for a jury on their first day of service are typically excused. While this approach reduces the time commitment for jurors, it also increases the number of individuals who are summoned and subsequently excused. This increases the number of jurors overall in the system and makes your chance of getting called for jury duty slimmer since there is a bigger pool.

The confluence of these factors statistical probability, selection algorithms, infrequent jury trials, and the implementation of “one day or one trial” systems collectively influences the probability of an individual receiving a jury summons. While random selection aims to ensure fairness and equal opportunity, the inherent nature of probability dictates that some eligible individuals will never be called for jury service, despite their willingness to serve. Understanding these dynamics is crucial for contextualizing the question of “why have I never been called for jury duty.”

4. Address Updates

The accuracy of residential address information is a critical determinant in the receipt of a jury summons. Databases used for jury selection rely on current address information to contact prospective jurors. Failure to maintain up-to-date address records can lead to a missed summons, contributing to the circumstance of never being called for jury duty.

  • Database Synchronization

    Jury selection databases often pull information from multiple sources, including voter registration records and Department of Motor Vehicles (DMV) databases. However, these databases are not always synchronized in real time. If an individual updates their address with one agency but not another, they may still be listed at their previous address in the jury selection database. This asynchronicity can result in a summons being sent to the incorrect address, effectively excluding the individual from jury selection.

  • Postal Service Limitations

    While the United States Postal Service (USPS) offers forwarding services, these services are not permanent. After a specific period, mail forwarding expires, and mail is returned to the sender. If a jury summons is sent to a previous address and mail forwarding has expired, the summons will be returned as undeliverable, and the individual will not be notified of their jury duty obligation. The returned mail does not automatically trigger an update in the jury selection database, perpetuating the problem.

  • Residential Mobility

    High rates of residential mobility, particularly among certain demographic groups, exacerbate the challenge of maintaining accurate address information in jury selection databases. Individuals who move frequently may be less likely to update their address information promptly with all relevant agencies, increasing the risk of a missed jury summons. This issue is compounded by the fact that jury duty is a legal obligation linked to residency within a specific jurisdiction.

  • Confirmation Procedures

    Some jurisdictions employ confirmation procedures to verify the accuracy of address information before sending a jury summons. These procedures may involve sending a preliminary notice requesting confirmation of the individual’s current address. However, even with these procedures, it is possible for notices to be missed or ignored, particularly if the individual no longer resides at the address on file. The lack of response reinforces inaccuracies in database lists.

In summary, the accuracy and currency of address information are paramount to receiving a jury summons. Discrepancies arising from database asynchronicity, postal service limitations, residential mobility, and missed confirmation procedures contribute to the reasons “why have I never been called for jury duty”. Maintaining accurate records with relevant government agencies remains the individual’s responsibility.

5. Exemption Requests

The submission and approval of exemption requests directly impacts an individual’s likelihood of being summoned for jury duty. Exemptions, legally permissible excuses from jury service, are granted based on specific criteria outlined by state or federal law. Successfully claiming an exemption effectively removes an individual from the potential juror pool for a specified period, directly contributing to the circumstance of not being called for jury duty. The cause is the approved exemption request; the effect is the absence of a jury summons. Common grounds for exemption include age (typically over a certain threshold), medical conditions, childcare responsibilities, active military service, or prior jury service within a recent timeframe. For instance, an individual who is the sole caregiver for a dependent child and meets the legal requirements for exemption may submit a request accompanied by supporting documentation. If approved, that individual is legally excused and will not be considered for jury service during the exemption period. This highlights the pivotal role exemption requests play in shaping the juror pool and affecting individual experiences with jury duty.

The allowance of exemption requests acknowledges the diverse circumstances of individuals and aims to balance civic duty with personal hardship. Without exemptions, the burden of jury service could disproportionately affect certain segments of the population, potentially leading to undue strain on families or essential services. For example, requiring a single parent with no available childcare to serve on a lengthy trial could create significant financial and emotional hardship. Similarly, compelling a physician responsible for providing critical medical care in a rural community to serve on a jury could jeopardize patient well-being. Exemption processes provide a mechanism to address these concerns and ensure that jury duty is not imposed in situations where it would cause substantial hardship or compromise essential services. The frequency and nature of successful exemption requests provide vital insights into how legal frameworks accommodate individual life circumstances within the obligations of civic duty. Furthermore, a high volume of successful exemptions based on a specific ground could signal an opportunity to re-evaluate existing policies and address the underlying challenges faced by prospective jurors.

In conclusion, the interaction between exemption requests and the jury selection process significantly determines who is called for jury duty. While the random selection process is designed to ensure a fair distribution of civic responsibility, the option to request an exemption allows individuals to address legitimate hardships or circumstances that would make jury service unduly burdensome. Understanding the permissible grounds for exemption and the procedures for submitting a request is crucial for those seeking to be excused from jury duty. However, it is important to recognize that not all requests are granted, and the ultimate decision rests with the court. The existence of exemptions is not a guarantee of avoiding jury duty, but rather a legally recognized mechanism to address specific circumstances that may warrant exclusion from service. A combination of eligibility and database factors must allow for your name to be in the system when exemption requests are submitted.

6. Disqualification Factors

Disqualification factors represent legally defined conditions that automatically preclude an individual from serving on a jury. These factors directly contribute to the reason someone might inquire, “why have I never been called for jury duty.” Their presence removes an individual from the pool of potential jurors, regardless of other eligibility criteria.

  • Felony Convictions

    A prior felony conviction is a common disqualification factor across many jurisdictions. The rationale is that a felony conviction may raise concerns about an individual’s impartiality or adherence to the law. The specific scope of this disqualification varies; some jurisdictions permanently exclude convicted felons, while others restore jury eligibility after the completion of their sentence or a period of good behavior. For example, an individual convicted of a felony, even if years ago, might be permanently ineligible for jury service in certain states, directly answering their question about the lack of summons.

  • Lack of English Language Proficiency

    The ability to understand and communicate effectively in English is essential for comprehending courtroom proceedings and evaluating evidence. Individuals lacking sufficient English language proficiency are typically disqualified to ensure they can fully participate in the deliberative process. This disqualification aims to prevent misinterpretations or misunderstandings that could compromise the fairness of the trial. Therefore, an individual who does not meet the required language proficiency standards will not receive a jury summons.

  • Mental or Physical Incapacity

    Individuals with mental or physical conditions that substantially impair their ability to perform the duties of a juror may be disqualified. This assessment considers factors such as the ability to understand complex information, follow instructions, and participate in deliberations. The goal is to ensure that all jurors are capable of contributing meaningfully to the decision-making process. A documented and verified condition preventing active participation in a trial will result in an exclusion from jury service.

  • Official Misconduct

    Certain forms of official misconduct, such as perjury or bribery, can result in disqualification from jury service. This measure aims to preserve the integrity of the justice system by excluding individuals who have demonstrated a disregard for the rule of law. The underlying premise is that individuals who have engaged in such behavior may not be suitable to serve as impartial jurors. These actions can trigger permanent ineligibility for serving on a jury.

These disqualification factors highlight how specific legal and practical considerations shape the pool of eligible jurors. An understanding of these elements is crucial in addressing the question of “why have I never been called for jury duty” by identifying conditions that legally prevent an individual from being considered for jury service.

7. Source List Overlap

Source list overlap, a characteristic of jury selection processes utilizing multiple databases, presents a nuanced factor contributing to the inquiry of “why have I never been called for jury duty.” Jurisdictions often compile jury pools from various sources, including voter registration records, Department of Motor Vehicles (DMV) databases, and state tax rolls. The degree of overlap between these lists directly influences the probability of an individual being selected for jury service. When a person’s name appears on multiple source lists, it does not necessarily increase their chances of selection proportionally. Instead, depending on the algorithm employed, the presence of duplicate entries may introduce complexities that, counterintuitively, can leave an individual feeling underrepresented in the jury pool. For example, if a selection process does not adequately de-duplicate names across lists, individuals appearing on multiple lists might only be considered once, effectively negating the impact of their multiple entries. This outcome can occur due to the selection algorithm only processing each unique identifier (e.g., social security number or driver’s license number) once, irrespective of how many times that identifier appears across different source lists. The practical significance of understanding this phenomenon lies in recognizing that database redundancy does not automatically translate into a higher selection probability; rather, the method used to manage and process this overlap is critical.

Consider a scenario where a county draws potential jurors from both voter registration and DMV databases. If an individual is registered to vote and possesses a driver’s license within that county, their name will appear on both lists. If the jury selection software fails to identify and consolidate these duplicate entries, the individual will only be considered once during the random selection process. Conversely, someone only present on one source list might have the same statistical probability of selection. The implication is that reliance on multiple lists, without proper management of overlapping data, can inadvertently create an inequitable selection process. Furthermore, the degree of overlap itself varies across demographic groups. Individuals more likely to be registered voters and licensed drivers may disproportionately populate multiple lists, potentially skewing the representation of those demographic groups in the jury pool. Addressing this issue requires sophisticated data management techniques, including robust de-duplication algorithms and ongoing monitoring to ensure a balanced and representative jury pool.

In conclusion, the presence of source list overlap, while intended to broaden the reach of jury selection, can inadvertently affect the likelihood of an individual receiving a summons. The key lies in the methods used to manage and process these duplicate entries. Inadequate de-duplication algorithms or inconsistent data management practices can negate the intended benefits of multiple source lists, potentially contributing to the circumstance of “why have I never been called for jury duty.” Recognizing this complexity underscores the importance of ongoing efforts to refine jury selection processes, improve data accuracy, and ensure a truly representative jury pool reflective of the community it serves.

8. Summons Frequency

Summons frequency, defined as the rate at which individuals are called for jury duty within a specific jurisdiction, significantly influences an individual’s likelihood of receiving a summons and directly relates to the question of “why have I never been called for jury duty.” The lower the summons frequency in a given area, the smaller the pool of jurors needed, thereby decreasing each eligible individual’s probability of being selected. This scarcity of summonses is a pivotal factor explaining why many citizens may never experience jury service. For example, a county with a small population and a limited number of court cases requiring juries will naturally have a lower summons frequency than a densely populated urban area with a high volume of litigation. This difference in summons frequency provides a clear cause-and-effect relationship: low summons frequency results in a reduced chance of selection.

The importance of summons frequency lies in its impact on the representativeness of the jury pool and the distribution of civic responsibility. A low summons frequency can lead to a situation where the same individuals are repeatedly called for jury service while others are consistently overlooked. This can result in a jury pool that does not accurately reflect the demographics and perspectives of the community, potentially compromising the fairness and impartiality of the judicial process. Additionally, a lack of opportunity to participate in jury duty can diminish civic engagement and erode public trust in the justice system. Jurisdictions vary significantly in their summons frequency due to factors such as budget constraints, the number of court cases, and the efficiency of jury management systems. Understanding these variations is crucial for assessing the equity and effectiveness of jury selection processes. Furthermore, jurisdictions employing “one-day or one-trial” systems tend to have a higher summons frequency than those with more traditional jury service models. Under this system many are called to the court with a one day requirement that unless they are selected for a trail, they do not have to return. These jurisdictional differences underscore the practical significance of considering summons frequency when addressing the question of long-term absence of jury duty notifications.

In summary, summons frequency functions as a crucial factor determining who is called for jury duty and who is not. Low summons frequency, arising from a combination of demographic, economic, and administrative factors, reduces the probability of an individual being selected, thus providing a direct explanation for “why have I never been called for jury duty.” Addressing this issue requires jurisdictions to carefully evaluate their jury management practices, optimize summons frequencies, and strive for a more equitable distribution of civic responsibility. Without such efforts, a significant portion of the population may remain excluded from the essential function of jury service. The amount of people called and the type of system used, makes a great contribution as to the type of summons frequency of an area.

9. Jurisdictional Variations

Variations in jury selection practices across different jurisdictions significantly contribute to the phenomenon of “why have I never been called for jury duty.” Jury selection is not a uniform process nationwide; states, and sometimes even counties within states, implement distinct eligibility requirements, source list compilation methods, exemption criteria, and summons frequencies. These jurisdictional variations create a mosaic of probabilities, influencing an individual’s chance of being called for jury service based solely on their place of residence. For example, a person residing in a state with stringent eligibility requirements and limited source lists may have a considerably lower probability of receiving a summons compared to someone living in a jurisdiction with more inclusive criteria and broader data sources. This disparity directly answers the question, revealing that geographical location and its associated jury selection policies can be a primary determinant in the absence of jury duty notifications. The cause (jurisdictional differences) leads directly to the effect (lack of jury summons).

The importance of jurisdictional variations lies in understanding that the seemingly simple question of “why have I never been called for jury duty” has a complex and multifaceted answer rooted in legal and administrative structures. Consider two individuals, both citizens, of legal age, and without felony convictions. One resides in a large, urban county using voter registration, DMV records, and state tax rolls as source lists, employing a “one-day or one-trial” system, and with relatively relaxed exemption criteria. The other lives in a rural county using only voter registration, following a traditional jury service model, and having stringent exemption rules. The first individual may be summoned every few years, while the second may never receive a summons. These examples underscore that the perceived lack of civic engagement or potential disqualification is often not the determining factor. Rather, the local rules and resources play a more decisive role. Practical significance arises from the realization that influencing change requires engagement at the local level. Awareness of these jurisdictional nuances is the first step in advocating for fairer and more representative jury selection practices.

In conclusion, understanding that “why have I never been called for jury duty” can be significantly influenced by jurisdictional variations provides valuable context. Recognizing the disparities in eligibility requirements, source list compilation, exemption criteria, and summons frequencies across different regions clarifies that the absence of a jury summons is not necessarily indicative of personal ineligibility or systemic error. It highlights the fact that the lottery of jury selection is heavily weighted by geographical location and its associated policies. This knowledge serves as a foundation for advocating for more standardized and equitable jury selection processes across jurisdictions. It also brings to light issues which can be addressed to improve the amount of demographic balance for called jurors.

Frequently Asked Questions

The following addresses common inquiries regarding the absence of a jury duty summons.

Question 1: What factors determine eligibility for jury duty?

Eligibility requirements typically encompass age, citizenship, residency within the jurisdiction, English language proficiency, and the absence of a felony conviction. Specific criteria vary by state and federal law.

Question 2: How are potential jurors selected?

Potential jurors are generally selected randomly from source lists, primarily voter registration records and Department of Motor Vehicles (DMV) databases. Some jurisdictions also use state tax rolls or other official records.

Question 3: Is it possible to be permanently exempt from jury duty?

Permanent exemptions are rare and usually limited to specific circumstances defined by law, such as advanced age or certain debilitating medical conditions. Blanket exemptions are uncommon.

Question 4: What if an individual has moved and not updated their address with all relevant agencies?

Failure to update address information with the DMV, voter registration, and other relevant agencies can result in a missed jury summons. Jury selection databases rely on accurate address data.

Question 5: Does having a prior felony conviction automatically disqualify an individual?

A prior felony conviction often disqualifies an individual from jury service. However, some jurisdictions restore jury eligibility after the completion of the sentence or a period of good behavior. Specifics depend on state law.

Question 6: If an individual is not selected for jury duty, does it mean they are not a good citizen?

Not receiving a jury summons does not reflect on an individual’s civic responsibility. Random selection and varying summons frequencies mean that many eligible citizens may never be called for jury service.

The absence of a jury summons does not automatically indicate an error or disqualification. Various factors contribute to the selection process.

The subsequent section will examine steps individuals can take to ensure accurate information in relevant databases.

Tips for Addressing the Absence of Jury Duty Summons

The absence of a jury duty summons can prompt questions about individual eligibility and database accuracy. While the selection process is largely random, several steps can be taken to ensure accurate information and increase the likelihood of receiving a summons, assuming eligibility.

Tip 1: Verify Voter Registration Information: Ensure voter registration details, including current address and name, are accurate and up-to-date. Voter registration lists are frequently used as source lists for jury selection.

Tip 2: Update Department of Motor Vehicles (DMV) Records: Maintain current address information with the DMV. DMV databases also serve as primary sources for identifying potential jurors.

Tip 3: Confirm Address Accuracy with Tax Authorities: Ensure that mailing addresses on file with state and federal tax authorities are correct. Some jurisdictions utilize tax records for jury selection.

Tip 4: Check Eligibility Requirements: Review the specific eligibility requirements for jury duty in the relevant jurisdiction. These requirements typically include age, citizenship, residency, and the absence of a felony conviction.

Tip 5: Inquire with the Local Jury Commissioner: Contact the local jury commissioner’s office to inquire about the jury selection process and confirm that individual information is accurately reflected in their records. A polite and professional inquiry can provide valuable insights.

Tip 6: Understand Exemption Criteria: Familiarize oneself with the permissible grounds for exemption from jury duty. While not aimed at securing an exemption, knowing the criteria can help identify if circumstances warrant a request for excused service.

Tip 7: Be Patient: Jury selection is a random process. Even with accurate information, there is no guarantee of receiving a summons. Patience and continued verification of information are advisable.

These steps do not guarantee a jury summons. Rather, adhering to these recommendations ensures individual data is accurate and allows random selection processes function as intended.

Having addressed measures to ensure data accuracy and understanding of selection practices, the article concludes with a summation of key insights regarding jury duty summons and their relevance to civic participation.

Why Have I Never Been Called for Jury Duty

The exploration of “why have I never been called for jury duty” reveals a complex interplay of eligibility criteria, database accuracy, random selection processes, and jurisdictional variations. This examination underscores that the absence of a jury summons does not inherently indicate ineligibility or a system error. Instead, it reflects the probabilistic nature of jury selection, influenced by factors ranging from residency to the algorithms governing juror selection. A comprehensive understanding of these elements provides context for interpreting the absence of a summons and appreciating the nuances of civic participation within the legal system. The eligible population may be smaller than one may expect.

Recognition of the factors influencing jury selection encourages proactive engagement in civic data maintenance and informed participation in local governance. By confirming and updating relevant records and staying informed about jurisdictional practices, citizens contribute to the accuracy and representativeness of the jury pool. Furthermore, understanding the systemic factors at play promotes a more nuanced perspective on individual experiences with jury duty, encouraging continued advocacy for equitable and transparent jury selection processes. This exploration is meant to shed light for readers, and inspire positive action. An informed public should know that is not an exact science.