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".

He seems intelligent to study medicine.
acceptable

Although Doc might tell it to you, he won't to me.
acceptable

The river froze solid.

acceptable