instruction: Is the next sentence syntactically and semantically acceptable?

Seven more came in after ten soldiers had left.

response: unacceptable

instruction: Is the next sentence syntactically and semantically acceptable?

He's the happiest that I've ever seen him.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

Sandy is either a lunatic or under the influence of drugs.

response: acceptable

instruction: Is the next sentence syntactically and semantically acceptable?

The bartender gave John some good beers.

response:
acceptable