Einstein's special theory of relativity, based on two assumptions (the laws of physics are the same in every frame of reference, and the speed of light is independent of the state of motion). Einstein described reality with these axioms rather than 'yelling at reality', deducing length contraction, time dilation, and grounding the Lorentz transformations. In Rząsa's talk, a parable for how scientists make progress by writing things down instead of patching around surprises.