Knights, Knaves, Jokers

Logic Level 3

Suppose you are visiting an island with knights, who always tell the truth, knaves, who always lie, and jokers, who can do either.

You meet two islanders named Anne and Dovi.

Anne says, "If I am a knight, then Dovi is a knave."

Dovi says, "If I am a knight, then Anne is a knave."

How many of them are knights?


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