A big challenge to this Socratic tradition came in Wittgenstein’s later work, Philosophical Investigations (1953). Some of our notions, Wittgenstein said, could be thought of as family resemblance concepts. A family resemblance concept is one that groups together various different things on the basis of them having resemblances but where there isn’t a single essence they all have in common.
Family resemblence concept. Wittgenstein
