My wife would like me to point out that unlike the depiction of aphasics in House MD's latest episode, A Failure to Communicate (aired a week ago in the US), they do not usually communicate in code. The words they substitute tend not to be related to the replaced words until at least six months after they first get the condition and even then, only infrequently.
More importantly, they tend to have comprehension issues as well, so they can't understand what's being said to them. Those two complaints combined tend to knacker the whole episode in fact.
Damn. That's ruined my faith in
Sherlock Holmes Gregory House, now.