In a response to a question about conceptual analysis and lexicography, Peter Lipton said, "...you can have a justified true belief without knowing, because it may still be just a matter of luck that your belief is true". It is my understanding based on some reading of epistemology that you can't have true knowledge if there's the possibility that your belief is wrong (i.e., you got lucky). Is this a widely held belief in epistemology or am I wrong? Because the definition seems to make sense to me. For example someone rolls dice and says "It's going to be snake eyes", but even if the roll does turn up snakes eyes, they certainly didn't KNOW it (unless the dice were rigged).