TASK DEFINITION: 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".
PROBLEM: They said that Tom would pay up, and pay up he did.

SOLUTION: acceptable

PROBLEM: Sally is such a fool as people think.

SOLUTION: unacceptable

PROBLEM: You can do it, but you better not.

SOLUTION:
acceptable