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Can someone please explain the answer? No cat is rat.No rat is dog.So, (a) No cat is dog. (b)No dog is cat. Is (a) true? Is (b)true? Is (a) and (b) true? Is (a) and (b) false? Thank you.

Hey guys, I'm ruzedski .I've registered for the first time in a forum of this kind and am quite unfamiliar with the way it works. Just been looking thru' . Its really nice to see people from different walks of life trying to help each other out. Hope to learn a lot of good stuff and make some...