{"id": "nat-refl", "statement": "\u2200 n : Nat, n = n"}
{"id": "and-swap", "statement": "\u2200 p q : Prop, p \u2227 q \u2192 q \u2227 p"}
{"id": "add-zero", "statement": "\u2200 n : Nat, n + 0 = n"}