I've come to the conclusion that even the mentally comatose are capable of doublethink

Not quite. Cognitive dissonance can come from double think, but isn't the same

Cognitive dissonance it was my understanding is when you hold a belief, but the actions you're taking or the situation you're in (by force or by choice) are not in line with the belief you hold.
`
Double think is the act of holding two contradictory opinions at the same time that are not in line with one another - and using those opinions to distract and subdue others.
`
An example of double think would be:
"Discriminating or being racist against anyone based on their skin color is intolerable."
.
"There is no such thing as racism against a group with this specific skin color."
.
.
A more controversial example that has been used:
`
"Gender and sexual preference are social constructs - every person can choose to be whatever they want to be at any time, and it is 100% a choice."
`
"I was born a gay man who is attracted to men. This is my natural state, and this is something that cannot be changed."

Relevant