Is the following sentence linguistically acceptable?
Hardly any of the citizens ever say anything.

acceptable

Is the following sentence linguistically acceptable?
Because into the room came Aunt Norris, Fanny stopped talking.

unacceptable

Is the following sentence linguistically acceptable?
I finally worked up enough courage to ask which people up at corporate headquarters the sooner I solve this problem, the quicker I'll get free of.

unacceptable

Is the following sentence linguistically acceptable?
If Ron knows whether to wear a tuxedo, and Caspar knows whether not to, do they know different things?
acceptable