instruction:
You're given a sentence and your task is to classify whether the sentence is acceptable or not. Any sentence which is grammatically correct, has a naturalistic text, is written by a native speaker and which minimizes superfluous content is acceptable, otherwise unacceptable. If the sentence is acceptable then write "acceptable", otherwise "unacceptable".
question:
Bob proved that this set is recursive.
answer:
acceptable


question:
He impresses his friends all as pompous.
answer:
unacceptable


question:
Maxwell isn't half the doctor that his father was.
answer:

acceptable