> In abstract nonsense we usually write > A ⊕ B = (A × {0}) ∪ (B × {1}) Hardly nonsense! This makes clear the connection to sets in a way that words weren't

> In abstract nonsense we usually write > A ⊕ B = (A × {0}) ∪ (B × {1}) Hardly nonsense! This makes clear the connection to sets in a way that words weren't doing for me.