Sentence 1: China is not 10 feet tall.

Sentence 2: China is 10 feet tall.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: However, a Harvard study showed that the covering residents made serious mistakes six times more often than even fatigued residents.

Sentence 2: Residents covering for others made more serious mistakes than fatigued residents.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: uh right yeah uh got to counting the other day and uh i think i have what was it two hundred and i got to thinking the money that i've got invested in this

Sentence 2: I've counted four hundred the other day.
Is this second sentence entailed by the first?

Answer:
no