One has to wonder.
I mean, I would expect that even a moderately affected dementia patient could read a prepared speech with practice. But there were many Dems who drove to his acceptance speech site in cars to watch his acceptance. they stayed in their cars, and he could have come outside to accept and speak, but he remained inside, tucked away from all but his handlers.
I would prefer to have the public accept the speech as is because it removes the ridiculously low bar for Biden at the upcoming debates except for two things:
1) I genuinely do wonder if it was prerecorded - and how many takes did it take to scult it just right - just out of curiosity.
2) I know that the Dems are going to opt out of the debate because reading from a prompter is way, way different than facing Trump on stage with spontaneous questions.
Link: https://www.breitbart.com/politics/2020/06/23/watch-joe-biden-tries-to-interact-with-prerecorded-question-says-stop-the-cold-war-future/