Semantics is a difficult problem. Wittgenstein once stated "Semantic atoms exist, and I will find them". 20 years later he had to admit defeat and said "Tell me

Semantics is a difficult problem. Wittgenstein once stated "Semantic atoms exist, and I will find them". 20 years later he had to admit defeat and said "Tell me, what's the essence of a chair?". Not long after that, he abandoned rationality completely.