instruction: Is the next sentence syntactically and semantically acceptable?

I reported having kissed Mary.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

It is rumored that he left town.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

They, they can't stand each other.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Any doctor will tell you that.

response:
acceptable