instruction: Is the next sentence syntactically and semantically acceptable?

In general, he understands what's going on.

response: acceptable


instruction: Is the next sentence syntactically and semantically acceptable?

Who left Bill.

response: acceptable


instruction: Is the next sentence syntactically and semantically acceptable?

Although Bob may not be a nut, many people have claimed and I think so too.

response: unacceptable


instruction: Is the next sentence syntactically and semantically acceptable?

I separated the yolk from the white.

response:
acceptable