Sentence 1: That's what I thought.

Sentence 2: That's what I know for sure.
Is this second sentence entailed by the first?

Answer: no

Sentence 1: The people of Edinburgh are often accused by their fellow Scots of lacking passion and have been labeled prim and proper.

Sentence 2: The people of Edinburgh are accused by their fellow Scost of not being passionate.
Is this second sentence entailed by the first?

Answer: yes

Sentence 1: You'll land at the main island, Terre-de-Haut, after a 15-minute small-plane flight from Pointe Pitre.

Sentence 2: Terre-de-Haut is a tiny island of 75 miles in diameter.
Is this second sentence entailed by the first?

Answer:
it is not possible to tell