The later... I ask because every time I read about some thought experiment, it turns out to be an impossible experiment. In a recent story I asked in general a

The later... I ask because every time I read about some thought experiment, it turns out to be an impossible experiment. In a recent story I asked in general and others told me that there were thought experiments that became proper experiments. But it seems that they were somewhat different, more like pre-experiments. When something gets stuck in the thought experiment category, it's more like a no-experiment. I have no problem admitting that this kind of ellucubration is useful to anticipate problems. But extracting conclusions from an impossible setup? That's like asking what would happen if an irresistible force meets an immovable object.