“How can they can assume these maps actually exist?”Typo or added "can"?
Jonathon couldn’t help but to laugh as well.remove 'to'
Professor Hess cleared his throat and looked at his shoes, obviously not given advance warning that he was going to speak about his procedures [he was the type of man that needed several stacks of note cards to get him through half of a lecture].
“I thought that if brain waves could be applied like sound waves from one source to another- sort of like how a radio works- it could intercept the waves already existing in Ferdinand’s brain, but being transmitted from A_O instead of a human source. Naturally, he had to resort to a person who- revealed through tests- had the sort of brain that would transmit the waves at a higher pitch than A_O’s, blocking the messages and eventually setting up a permanent system to counteract such things.”
"Don't you know? Cirrhosis means his liver isn't functional anymore. He'll die soon.”
She paled. “What!"