Final answer:
Claims may be contestable for material misrepresentation for a specific period depending on the legal context, such as advertising or defamation cases.
Step-by-step explanation:
For the period that claims may be contestable for material misrepresentation, it would depend on the specific legal context. In advertising, the Federal Trade Commission (FTC) checks factual claims about a product's performance, but language that is exaggerated or ambiguous, without being false, is allowed. Untrue facts, however, are not permitted. In cases of defamation, a public official can only recover damages for a defamatory falsehood if they can prove that it was made with 'actual malice' - meaning knowledge of its falsity or reckless disregard for the truth.