Some famous scientists and cakes:

Arthur C. Clarke: Today, cake... tomorrow, a chain of bakeries, stretching far across the galaxy.

Gregor Mendel: I have discovered if you combine the mixtures for madeira cake and fruit cake, there result a cake with no raisins, two cakes with some raisins, a fourth cake entirely composed of raisins, and a sudden influx of hungry visitors to the monastery.

Charles Darwin: In a million years, only the tastiest cakes will exist.

I'm surprised Werner Heisenberg was not on the list: You may observe the cake's position or note how fast it is consumed by your party guests, but not both.