Question

An illusory contract is unenforceable by either party because

Answer 1

An illusory contract is unenforceable by either party because indefiniteness or lack of mutuality, where only one side is bound to perform. An example of this would be an agreement between a seller and buyer which states that the seller "agrees to sell all of the ice cream he wants to" to the buyer.

Illusory promise is one that courts will not enforce. This is in contrast with a contract, which is a promise that courts will enforce. A promise may be illusory for a number of reasons. In common law countries this usually results from failure or lack of consideration (see also consideration under English law).

Illusory promises are so named because they merely hold the illusion of contract. For example, a promise of the form, "I will give you ten dollars if I feel like it," is purely illusory and will not be enforced as a contract.