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".

Fluffy is sick, as not everybody knows.
acceptable

Lorenzo saw the eclipse.
acceptable

I deny that that Bob has some money is certain.

unacceptable