Is the following sentence linguistically acceptable?
The hardest that I believe that it ever snowed was last January 12th.

acceptable

Is the following sentence linguistically acceptable?
I wonder what Fiona bought.

acceptable

Is the following sentence linguistically acceptable?
I do not love peanut butter.

acceptable

Is the following sentence linguistically acceptable?
The fact that the scientists used the latest technology to verify was reported at the recent conference.
acceptable