Example: Hercule Poirct was sure that the woman had written the letter.— She must have written the letter.
1 Hercule Poirot was sure that the criminal had escaped.
2 Miss Marple thought that the woman had met her husband, but she was not sure.
3 Sherlock Holmes was certain that the suspect had not been able to escape.
4 Anastasia Kamenskaya understood that Liza had met her son secretly.
5 Hercule Poirot doubted that the burglar had escaped, though it was possible.
a) She could have met him.
b) He might have escaped.
c) He must have escaped.
d) She must have met him.
e) He can't have escaped.