instruction: Is the next sentence syntactically and semantically acceptable?

His expectations lower, the higher the stakes are.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

John will have been eating cake.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The love of my life and father of my children would never do such a thing.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

A boy did not laugh.

response:
acceptable