Admissible Evidence Definition and Federal Rules

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Contents

Admissible is the correct legal term
Federal admissibility starts with relevance
Rule 403 can exclude relevant evidence
Hearsay creates another admissibility question
Authentication addresses whether an item is what it claims to be
The judge resolves preliminary admissibility questions
Sources

Key Facts

Federal level: Admissible evidence is evidence the judge permits the fact-finder to consider in deciding the case.
Federal level: Rule 401 treats evidence as relevant when it tends to make a consequential fact more or less probable.
Federal level: Rule 402 makes relevant evidence generally admissible but recognizes exclusions created by the Constitution, federal statutes, evidence rules, and other Supreme Court-prescribed rules.
Federal level: Rule 403 can exclude relevant evidence when its probative value is substantially outweighed by specified dangers or costs.
Federal level: Rule 901 requires sufficient evidence to support a finding that an item is what its proponent claims.
Federal level: Authentication under Rule 901 does not eliminate other objections, including hearsay.

Admissible is the correct legal term

“Admissible” means that evidence may be presented to the judge or jury for consideration in deciding a case. The spelling “admissable” is incorrect in standard American English, although it is a common way people search for the term.

Admissibility determines whether evidence may be presented to the fact-finder for consideration. Under Rule 104(a), the court decides preliminary questions about whether evidence is admissible.

Federal admissibility starts with relevance

The Federal Rules of Evidence govern admission and exclusion in most proceedings in United States courts. Rule 401 defines evidence as relevant when it has any tendency to make a consequential fact more or less probable.

Rule 402 provides the general starting point. Relevant evidence is admissible unless the United States Constitution, a federal statute, the evidence rules, or other rules prescribed by the Supreme Court provide otherwise, while irrelevant evidence is inadmissible.

Relevance under Rule 401 does not end the inquiry because Rule 402 recognizes other grounds for exclusion. Rule 403 is one such ground and may exclude relevant evidence under its balancing standard.

Rule 403 can exclude relevant evidence

Rule 403 permits exclusion when probative value is substantially outweighed by unfair prejudice, confusing the issues, misleading the jury, undue delay, wasting time, or needlessly presenting cumulative evidence. The rule focuses on unfair prejudice rather than every disadvantage that evidence may create for one side.

Hearsay creates another admissibility question

Rule 802 bars hearsay unless a federal statute, the Federal Rules of Evidence, other Supreme Court-prescribed rules, or another rule identified in Rule 802 provides otherwise. Evidence can consequently be relevant yet inadmissible under the hearsay rule.

Authentication addresses whether an item is what it claims to be

Rule 901 requires the proponent to produce evidence sufficient to support a finding that an item is what the proponent claims it is. The rule lists examples, including testimony from a knowledgeable witness, distinctive characteristics, and evidence describing a process or system that produces an accurate result.

Authentication does not by itself guarantee admission. The Rule 901 committee notes state that other barriers, including hearsay, may remain after authentication.

The judge resolves preliminary admissibility questions

Rule 104(a) assigns the court preliminary questions about witness qualification, privilege, and admissibility. Rule 104(b) separately addresses evidence whose relevance depends on whether a fact exists.

Under Rule 104(b), when relevance depends on whether a fact exists, the proponent must introduce evidence sufficient to support a finding that the fact exists. Under Rule 104(a), the court decides preliminary questions about admissibility.