Is the following sentence linguistically acceptable?
Calvin has eaten a peanut.

acceptable

Is the following sentence linguistically acceptable?
We had hoped to get three new equipments every month, but we only had enough money to get an equipment every two weeks.

unacceptable

Is the following sentence linguistically acceptable?
The room was left angry.

unacceptable

Is the following sentence linguistically acceptable?
The proof that this set is recursive is difficult.
acceptable