Impeachment by bias is best illustrated by which scenario?

• A. Presenting evidence of bias
• B. Showing their favorite color
• C. Introducing their prior convictions (non-immaterial)
• D. Demonstrating their punctuality

Answer: (A)

Impeachment by bias focuses on showing a witness isn’t neutral because a personal interest or prejudice could color what they say. Presenting evidence of bias demonstrates that the witness has a stake in the outcome or a predisposition that might influence their testimony, making their statements less trustworthy as evidence of the truth.

The other options don’t fit this concept: showing a favorite color has no bearing on reliability or neutrality; introducing prior convictions (non-immaterial) speaks to general credibility but not to bias toward one side; and demonstrating punctuality relates to reliability in performance, not to any prejudice or interest that would color testimony.