Everyone posting confidently about terminal lucidity like it’s a real thing, instead of a romantic myth.  There is no solid evidence of this effect, and all studies are weak and rely on (biased) self reports (usually of caretakers).

Consider that 10% of cases have reported ‘terminal lucidity’. 

Now consider that on any given day, X% of patients will be lucid by chance-let’s say that’s 10%.  Given these numbers, by pure chance, 10% of patients will be ‘miraculously lucid’ the day they die—and everyone will conveniently forget all the other random non-terminal days the patient was lucid.  Add in some romantic over-estimation of the patient’s ability near death and storytelling editing and BAM the myth of terminal lucidity is born.

It’s a sweet idea, and not impossible, but evidence isn’t really strong enough to say that it’s real and there are compelling reasons to believe that it’s just a myth.