How must a general offer be revoked according to the rules of contracts?

A general offer can indeed be revoked at any time before it is accepted, but the method of revocation matters. Revocation must be communicated to the offeree in a way that allows them to receive the information effectively. When an offer is made through a particular medium, it is often reasonable to expect the revocation to be conveyed using that same medium to ensure it is received and understood by the offeree.

This aligns with the principle that communication should be clear and consistent; if a person makes an offer through a specific pathway, it is usually most effective to withdraw that offer through the same pathway. If, for instance, an offer was made via email, revoking it through an email would be appropriate, as it maintains the communication method that both parties engaged with initially.

While it is true that offers can be revoked anytime before acceptance, the emphasis on the medium underlines the importance of effective communication in contract law. This principle helps to ensure that all parties involved are on the same page regarding the status of the offer.