89.

You are interviewing three forest inhabitants A, B, and C again. It is known that each of them is either a knight or a liar, and among them, there is exactly one werewolf. In conversation with you, they state:

A: I am the werewolf.

B: I am the werewolf.

C: No more than one of us is a knight.

Conduct a full classification of A, B, and C.
89. Let's first prove that C is a knight. Suppose C was a liar. Then his first statement would be false, which means at least two of the three other islanders would be knights. This would mean that A and B must both be knights (since by assumption C is a liar). Consequently, their statements would be true, and they would both, contrary to the conditions of the problem, be werewolves. Therefore, C is a knight. Then exactly two of the three are liars. They must be A and B. Since their statements are false, neither A nor B are werewolves. Therefore, the werewolf must be C. Thus, C is a knight and a werewolf, A and B are liars, and neither of them is a werewolf.