20 year old nephew: "Do you want a biscuit or a piece of cake?" 3 year old nephew: "Yes." 20 y.o.n: "It's one or the other. A biscuit or a piece of cake?" 3 y.o.n: "Yes." 20 y.o.n: "That's not a valid answer." 3 y.o.n: "Who's a ballet dancer?"
My 3 year old boy is wearing a Superman t-shirt today with 'I am the man of steel' across the back. My wife said to him 'are you the man of steel?' and he said no. So she asked him again and he said 'no, I never steal anything!'
Course it's a valid answer. He didn't ask which one he wanted, he asked if he wanted either, which the kid probably did.