Problem: Sentence: "Mark couldn't convince him."; Another sentence: "Sid explained his theory to Mark but he couldn't convince him."?
A: no

Problem: Sentence: "Kirilov was less popular."; Another sentence: "Kirilov ceded the presidency to Shatov because he was less popular."?
A: yes

Problem: Sentence: "Mark should have been more truthful."; Another sentence: "Mark told Pete many lies about himself, which Pete included in his book. He should have been more truthful."?
A:
yes