A chemist, a physicist and a biologist are walking along the beach. The physicist stops, looks out at the ocean and says “I just have to understand the motion of the waves better” and walks into the sea and never returns. The biologist looks out to the sea and says “I just have to understand the sea creatures better” and walks out into the ocean and never returns. The chemist pulls out a notebook and writes “Physicist and biologist both soluble.”