Tue 11 Nov 2002When you say no, mean noWe must be able to say "no" to our children if they are to learn to copewith adult life, writes Tony Humphreys 'They have not learned how to tolerate frustration'How many parents put up with a child whining or screaming "I want it, I want it, I want it"? How many give into the child's unreasonable demands for the sake of peace and quiet or so they don't appear to be "a bad parent" in the eyes of others or out of some misguided notion that a child's needs must be always given into.