Final answer:
A promise to refrain from doing something is considered valid consideration in contract law, which involves a legal value or detriment that is part of a bargained-for exchange. Deliberation, as described by Taylor, focuses on a cognitive process rather than a legal criterion.
Step-by-step explanation:
A promise to refrain from doing something is sufficient: consideration. In the context of contract law, consideration refers to something of value that is given by both parties to a contract that induces them to enter into the agreement to exchange mutual performances. The key elements include a legal value in the form of a benefit to the promisor or a detriment to the promisee, a bargained-for exchange, and that it must be legal and possible. In this case, refraining from doing something can be a form of detriment to the promisee, thereby making it valid consideration.
Deliberation, in contrast, encapsulates the cognitive process of thinking something through, engaging in the examination of possible actions or outcomes as discussed by Taylor. Deliberation involves a set of premises, including the idea that one deliberates only about one's own actions, only about future actions, and only if one believes these actions are within one's control. Hence, while deliberation is a cognitive action, consideration is a legal term related to the formation of a contract.