>It is impossible to do physics by thought experiments. There are an infinite number of logically consistent mathematical models of universes out there, only a

>It is impossible to do physics by thought experiments. There are an infinite number of logically consistent mathematical models of universes out there, only a small subset of them match up reasonably well to the one we exist in. Strongly disagree. The mathematical universes are heavily ordered by their simplicity and logical consistency and you can sort through them with thought alone. Also, anyway, the act of 'doing physics' includes a lot more than the somewhat small category of 'testing hypotheses with experiment'. It's like 95% model building and 5% experiment.