The Three Classic Laws of Logic (Plain-Language Guide) | Logic History Series In today's world, clear logic and critical thinking matter more than ever. Here are the three classic laws in human terms: 1) Law of Identity — A = A. A thing is what it is. 2) Law of Non-Contradiction — ¬(A ∧ ¬A). A claim can’t be true and false in the same way at the same time. 3) Law of the Excluded Middle — A ∨ ¬A. Every well-formed statement is either true or false—no middle option. Learning these basics is everyd