Your comment made my day.
I suddenly imagined a chimp sitting in front of his laptop, designing a better wheel and a more efficient way to make fire.

So does this mean we can be more suspicious than ever when Dubya says “I can’t recall” this or that?

Of course, a lot of time is wasted as we look up things again and again, forgetting what we looked up last time.
Now, combine a chimp’s memory with the ability to look things up, and then we’re cooking.

It’s been well-demonstrated that people from primary oral societies perform better than people from primary literate ones. We don’t need to have good memories. We can always look things up.