There was a very calm day. There were three people called A, B and C in the middle of a ground.
A was killed by either B or C. This incident was not seen by anyone (excluding B and C). So no one other than B and C knows who the killer is.
Albert Einstein guessed that A was killed by C.
But he is wrong.
How do you prove that A was killed by B?
Note : Since I have added science Tag, I believe that your answers should be related to science
Albert Einstein was wrong. (Pay attention to this sentence.)