👉 Non-exteriority is a concept in mathematical logic that refers to a property or rule that an object cannot satisfy. In other words, it's a property of an entity that prevents its own existence from being satisfied. This principle is often used in mathematics and logic as a way to analyze the properties of objects and their relationships. Non-exteriority can be seen in many mathematical structures, such as groups, rings, and fields, where every element has some non-trivial (i.e., not