Logical Biconditional

A logical biconditional is a way of expressing a relationship between two statements, denoted as "A if and only if B." This means that both statements are either true together or false together. If A is true, then B must also be true; conversely, if B is true, A must be true as well. For example, "You can enter the club if and only if you have a membership." This means you’re allowed in only if you have the membership, and having the membership guarantees your entrance.