instruction: Is the next sentence syntactically and semantically acceptable?

John likes not Mary.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Mary is more than five feet short.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

It snowed

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

John has not sung a song.

response:
acceptable