An intoxicated buyer made an offer on a house. The owners accepted the offer. This contract is

An illegal contract involves activities that violate the law, such as agreements for illegal substances or services. In this case, the contract for the sale of a house is not illegal; it is a legitimate agreement that simply involves a buyer who was intoxicated at the time of the offer.

A void contract is one that is not legally enforceable from the outset, such as contracts made under duress or for illegal purposes. While the intoxicated buyer may have diminished capacity, the contract is not void; it remains valid until the buyer exercises their right to void it.

A unilateral contract is one where only one party makes a promise or undertakes a performance contingent on the other party's action. In this case, the acceptance of the offer by the owners creates a bilateral contract, as both parties have obligations to fulfill under the agreement.