[Bork]

I guess I wasnt clear. The defect is simply that if you claim that it is impossible to justify knowledge through induction, which I am guessing all the 'no' answer people are doing then they are commited to saying that we know almost nothing. They dont know that Bush is president, they don't know that that the earth isnt resting on a turtles back, they dont know that dinosaurs existed, or JFK existed, etc. If you define knowledge in that sort of cartesian (must be proven deductively to be true) sense then you are going to know almost nill. Even when you think you have proven something deductively doubts will still creep in about error of inference or memory and with them inductive reasoning creeps in. Induction is not something that can be dismissed if we want to have knowledge beyond things like I am having a monitor like sensation right now, or the a priori necessary truths that were mentioned earlier.