Mechanical Engineering > GATE 2017 SET-2 > Logical Reasoning
All people in a certain island are either 'Knights' or 'Knaves' and each person knows every other person's identity. Knights NEVER lie, and knaves ALWAYS lie.

P says "Both of us are knights". Q says "None of us are knaves".

Which one of the following can be logically inferred from the above?
A
Both P and Q are knights
B
P is a knight; Q is a knave
C
Both P and Q are knaves
D
The identities of P, Q cannot be determined

Correct : d

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