A says " the horse is not black".

B says " the horse is either brown or grey."

C says " the horse is brown"

At least one is telling truth and at least one is lying. tell the color of horse?

• at least one is telling the truth and at least one is telling a lie.
  the horse is grey. so A is telling the truth( he says horse is not black). B is also telling the truth. ( he says it is either brown or grey). C is lying ( he says the horse is brown which is not).
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