Schrödinger's cat is a thought experiment, sometimes described as a paradox, devised by Austrian-Irish physicist Erwin Schrödinger in 1935,[1] during the course of discussions with Albert Einstein.[2] It illustrates what he saw as the problem of the...
The cat would be dead. The poison would kill it. The only paradox is that unless you checked the box, you wouldn't know for sure, but it'd still be dead.