Is the following sentence linguistically acceptable?
We need more intelligent leaders.

acceptable

Is the following sentence linguistically acceptable?
It is not true that it was obvious that it would confuse the guards for Herschel to throw a fit.

acceptable

Is the following sentence linguistically acceptable?
The mushrooms were sliced by the cook.

acceptable

Is the following sentence linguistically acceptable?
There is a flowering plant on the windowsill.
acceptable