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".
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Question: He impresses his friends all as pompous.

Answer: unacceptable


Question: I am frightened of tigers.

Answer: acceptable


Question: Tom says that it's going to rain but I don't believe it.

Answer:
acceptable