Would it be wrong to say, "I don't know" in reply to the question, "What is 1+1?" What about "I don't know" in reply to "If I hit you with this baseball bat, will it hurt?" Is it wrong to reply to everything with an "I don't know" statement? It has be known for people to reply with answers to questions that others have, yet there may always be that possibility that one day a bus goes off its route, that someone decides to not be a vegetarian, that someone finds a new thing in science that disproves all. Would it be wrong to say I don't know to everything in life? Do we truly know anything, or is it that we THINK we know. Thinking is not knowing, it's pondering. We are constantly in a state of thinking if we never know anything, for those who say I don't think. I would assume those who don't think must be in some type of state where they are possessed, in nirvana, vegetative, or have a complete loss of cognitive processes. So would it be right to say to everyone about any question they ask you, "I don't know?" I assume it would piss off a college professor however.