instruction: Is the next sentence syntactically and semantically acceptable?

Zeke ate and cooked the chili.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Every who read anything passed.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The average age at which people begin to need eyeglasses vary considerably.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

It hailed.

response:
acceptable