Logical relevance, conditional relevance, and Rule 403
Evidence is relevant when it has any tendency to change the probability of a consequential fact, but specified dangers can substantially outweigh its value.
Open the full module →Black-letter propositions
- Consequential facts come from substantive law, credibility, and stipulations.
- Rule 403 favors admission and asks whether unfair prejudice, confusion, misleading effect, delay, waste, or cumulativeness substantially outweighs probative value.
- Unfair prejudice means an improper decision basis, not simply damaging evidence.
- Conditional relevance is admitted if evidence could support a reasonable finding of the connecting fact.
- Completeness can require contextual portions of a writing or recorded statement at the same time.
Attack sequence
1Name the proposition and consequential element.
2Explain the inferential chain.
3Assess value in light of alternative evidence.
4Identify a specific 403 danger and limiting measure.
Traps and exceptions
!Authentication and hearsay are separate from relevance.
!A limiting instruction may reduce prejudice.
!Courts do not exclude proof merely because it strongly damages a party.
A gruesome photograph depicts injuries, but cause and severity are undisputed and less inflammatory images are available.
The photo is relevant, but marginal value may be substantially outweighed by unfair emotional impact in context. The court should compare need, detail, alternatives, and possible limiting measures.
Essay-ready formulationRelevant evidence tends to prove a consequential fact and is excluded under Rule 403 only when specified dangers substantially outweigh its contextual value.