> What does that even mean?

I think it is clear what he meant and it is a legitimate question.

If you took a 6 year old and told him about the things that happened in the last year and sent him off to work, did he integrate the last year's knowledge? Did he even believe it or find it true? If that information was conflicting what he knew before, how do we know that the most recent thing he is told he will take as the new information? Will he continue parroting what he knew before this last upload? These are legitimate questions we have about our black box of statistics.