Which of the following is NOT a way in which contracts can be ineffective?

A contract being enforceable indicates that it is valid and legally binding, meaning that the parties involved can be compelled to fulfill their obligations under that contract. In contrast, the other options describe statuses in which contracts can be deemed ineffective.

Void contracts are those that are not legally recognized from the onset, rendering them null and without any legal effect. Voidable contracts, on the other hand, are valid but can be declared invalid at the option of one party, often due to reasons like misrepresentation or undue influence. Illegal contracts involve activities or terms that violate laws or public policy, making them unenforceable.

Thus, stating that a contract is enforceable means it is effective in the eyes of the law, while the other options illustrate scenarios under which a contract may fail to have legal standing.