A more practical example: when people discuss cryonics or anti-aging, the following argument usually comes up in one form or another: if you were in a burning building, you would try pretty hard to get out. Therefore, you must strongly dislike death and want to avoid it. But if you strongly dislike death and want to avoid it, you must be lying when you say you accept death as a natural part of life and think it's crass and selfish to try to cheat the Reaper.

nitpick: Burning to death is painful and it can happen at any stage of life. "You want to live a long life and die peacefully with dignity" can also be derived but of course it's more complicated.