I found that the term "aphasia" or aphasiac has been used multiple times in the reading (525,588, previously but am too lazy to find). Aphasias are fascinating neurological deficits. Two common ones, Broca's and Wernicke's, deal with language processing. With Wernicke's, for example, you talk nonsensically even if you might understand what people are saying to you. The words coming out of your mouth simply don't align with thoughts.

While I feel that DFW uses some interesting adjectives, the continued references to neurological conditions (Madame Psychosis' radio show scene filled with neuroanatomy, etc) struck me as very interesting. This links back to the brainwashing we see both at AA as well as at Enfield, where Tavis describes to an intake the splitting open of her head and rearrangement and leisoning of parts to make it perfect). It seems that with all this mental rearrangement, Hal (and Orin, see my other post) have gotten emotional aphasias, where they may or may not process they should be feeling something, or feel that their face does not match their emotion. These "leisons" are less precise than Wernicke's or Broca's, but it's just a thought.