  A range of equally modern views follow from his proposed empiricist foundations for the new science and its methods. He suggests a probabilist notion of what counts as warranted empirical belief, and insists that we may license beliefs about the sub- and supra-perceivable but only if they are well-grounded in our beliefs about the perceptually given. Further, he devises rules for accepting or rejecting hypotheses, and guidelines for directing empirical discoveries and our judgments of the same, where all such claims are subject to the test of evidence from experiment or observation. It is far from true that all, or even most, of his own claims about the nature of the physical world meet this test, but the modernity of Gassendi's philosophy and science lies in his proposal that this is a goal to be set, altogether.