👉 An omnivalent is a property that all elements in a set have. This means that for any two elements in the set, if one element is true and the other is false, then both elements must be false to make the statement true. For example, consider the set {1, 2}. If we say "All dogs are mammals," then it would not be true if we said "Some dogs are not mammals." This is because a dog is not necessarily an animal, and some dogs