Final answer:
The Einstein Podolski-Rosen argument is a thought experiment that challenges the seemingly obvious conclusions about the behavior of light and the nature of reality.
Step-by-step explanation:
The Einstein Podolski-Rosen argument is a thought experiment that challenges the seemingly obvious conclusions about the behavior of light and the nature of reality. The argument is based on the principles of relativity and was proposed by Albert Einstein, Boris Podolski, and Nathan Rosen.
It highlights the need for actual observation to determine the validity of thought experiments, and experiments have repeatedly confirmed Einstein's theory of relativity.