A mutual mistake concerning a material fact:

Is it the plaintiff who has the burden of proving facts adequate to support the allegations in the complaint?

A new contract replacing an old one is enforceable:

Unjust enrichment:

Unlike the case of an oral contract, when a contract is written, there cannot be a dispute between the parties as to the terms of the agreement.

A valid offer:

Government regulation of business:

A revocation of an offer occurs when:

The purpose of antitrust laws is to:

Courts of equity: