What can lead a contract to be considered voidable?

A contract can be considered voidable due to a mutual mistake of fact because this situation arises when both parties enter into an agreement under a shared but incorrect assumption about a fundamental aspect of the contract. This mutual misunderstanding can materially affect the agreement, as it undermines the consent of the parties involved. When a mutual mistake is established, the affected party has the right to rescind the contract because it was based on false premises. This legal principle exists to ensure fairness and protect parties from being bound by agreements formed under erroneous beliefs.

The other options do not establish a clear basis for a contract to be voidable. Misunderstood terms, for example, may not necessarily reflect a mutual mistake and could lead to disputes over interpretation rather than the contract itself being voidable. The absence of a witness or lack of written documentation may affect enforceability or introduce challenges in proving a contract existed, but they do not inherently impinge on the underlying consent of the parties as does a mutual mistake of fact.