A: You mean that they'd randomly press one button or the other? Eh, i believe they'd push whichever one is closer, is brighter, catches their attention more easily, looks larger, etc. Actually, you don't have to make inhuman experiments; i once read something about a donkey with two corn stalks, one to each side; as far as i can remember, it said that if there was absolutely nothing that made one stalk different from the other (distance, size, color, whatever) then the donkey wouldn't be able to choose and would stand still and starve itself to death.
Q: So would it?