The doctor’s excitement made Peter nervous, so he remained quiet. He
perceived a flaw in the doctor’s argument, but his thoughts were too confused
for him to successfully point it out. Peter’s silence made the doctor smile.
"There. You see? You’ll get better. Right now, your memories are confused. When
your body changed, so did your brain. It rebuilt itself. And during that 
process, you lost some of your memory because memories are stored in the 
patterns of the brain. But some of it is still there. Some of it you’ll have to
re-learn. But you can do it."