 The result is useful to know: if you have two premises of which you are at least 99% certain, they entitle you to be at least 98% certain of a conclusion validly drawn from them. Of course, if you have 100 premises each at least 99% certain, your conclusion may have zero probability. That is the lesson of the “Lottery Paradox”. Still, Adams’s result vindicates deductive reasoning from uncertain premises, provided that they are not too uncertain, and there are not too many of them.