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".

The more Fred is obnoxious, the less you should pay attention to him.
acceptable

Jean is likely to leave.
acceptable

He believed there to be likely that he won the game.

unacceptable