Lesson plan

Harmless error

In United States law, a harmless error is a ruling by a trial judge that, although mistaken, does not meet the burden for a losing party to reverse the original decision of the trier of fact on appeal, or to warrant a new trial. Harmless error is easiest to understand in an evidentiary context. Evidentiary errors are subject to harmless error analysis, under Federal Rule of Evidence 103(a) ("Error may not be predicated upon a ruling which admits or excludes evidence unless a substantial right of the party is affected." ) The general burden when arguing that evidence was improperly excluded or included is to show that the proper ruling by the trial judge may have, on the balance of probabilities, resulted in the opposite determination of fact. In the case of Earll v. State of Wyoming, the Wyoming Supreme Court distinguished between reversible error (which requires a conviction be overturned) and harmless error (which does not), as follows: In the evidentiary context, a harmless error is usually one where the evidence had no relevance to the issues to be decided by the trier of fact, evidence admitted actually helped the party seeking the reversal, or the remaining evidence was overwhelmingly against the party seeking reversal. For example, a prosecutor may try to bolster his case by bringing in an expert witness to explain the behavior of one of the key witnesses.…

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Article summary

In United States law, a harmless error is a ruling by a trial judge that, although mistaken, does not meet the burden for a losing party to reverse the original decision of the trier of fact on appeal, or to warrant a new trial. Harmless error is easiest to understand in an evidentiary context. Evidentiary errors are subject to harmless error analysis, under Federal Rule of Evidence 103(a) ("Error may not be predicated upon a ruling which admits or excludes evidence unless a substantial right of the party is affected." ) The general burden when arguing that evidence was improperly excluded or included is to show that the proper ruling by the trial judge may have, on the balance of probabilities, resulted in the opposite determination of fact. In the case of Earll v. State of Wyoming, the Wyoming Supreme Court distinguished between reversible error (which requires a conviction be overturned) and harmless error (which does not), as follows: In the evidentiary context, a harmless error is usually one where the evidence had no relevance to the issues to be decided by the trier of fact, evidence admitted actually helped the party seeking the reversal, or the remaining evidence was overwhelmingly against the party seeking reversal. For example, a prosecutor may try to bolster his case by bringing in an expert witness to explain the behavior of one of the key witnesses.…

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Discussion questions

  1. Summarise the article in your own words. Which single claim would you verify first, and why?
  2. Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
  3. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

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Key claims and bibliography are generated from the same tracked claims and sources as the article page.