In this episode of Mastering Contracts, we delve into the critical concept of acceptance and how it plays a key role in the formation of contracts. We explore the mirror image rule, which requires an acceptance to exactly match the terms of the offer for a valid contract to form. But what happens if the acceptance deviates even slightly from the offer? Does that create a contract or a counteroffer? Join us as we break down these distinctions and explain when an acceptance is valid, how counteroffers complicate negotiations, and the modern-day exceptions under the UCC Section 2-207, which impacts contracts involving the sale of goods.