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In a given country, all inhabitants are knights or knaves. A knight never lies; a knave always lies. We meet three persons,

A, B

, and

C

. Person

A

says, “If

C

is a knight,

B

is a knave.” Person

C

says, “

A

and I are different; one is a knight and the other is a knave.” Who are the knights, and who are the knaves ?

Problem Statement