instruction: Is the next sentence syntactically and semantically acceptable?

He can't pay taxes, can he?

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

'' Doing my taxes '' gives a headache to 22 percent of Americans surveyed for Pfizer, which makes tylenol pain relief medicine.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Heather snorted.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

I liked Mary and John.

response:
acceptable