👉 Indescribability, also known as non-unique or non-isomorphic, is a concept in mathematics and theoretical computer science that refers to an object that cannot be expressed or described by another object. It arises when two objects are not "the same" in the sense of having the same properties but having different representations, structures, or behaviors. In other words, indescribability occurs when there exists a bijection between two sets (or more generally, any two nonempty collections
