👉 Countermeet is a concept in mathematical logic that refers to an equivalence relation on sets where two elements are equivalent if they have the same number of elements. This can be illustrated as follows: Let A and B be any two sets, then by definition, we can say that A and B are equivalent (denoted as A = B) if there is a one-to-one correspondence between their elements. For example, consider the set {1, 2, 3}, where we have: -
