Schrödinger's Cat Color Baseball T-Shirt

In simple terms, Schrödinger stated that if you place a cat and something that could kill the cat (a radioactive atom) in a box and sealed it, you would not know if the cat was dead or alive until you opened the box, so that until the box was opened, the cat was (in a sense) both "dead and alive". "To be, or not to be dead, that is the question" (Hamlet about Schrödinger's pet)