Legal Definitions - impossible consideration

Definition: Impossible consideration is a type of consideration that arises from a promise or performance that cannot be fulfilled.

Example: A promises to give B a unicorn in exchange for B's car. Since unicorns do not exist, this promise is an example of impossible consideration.

This definition explains that impossible consideration is a promise or performance that cannot be fulfilled. The example given illustrates this concept by showing a promise that cannot be fulfilled because unicorns do not exist. This type of consideration is not valid and cannot be used to support a contract.