 Accidental signs are objects or circumstances that have been frequently encountered in conjunction with an object, so that the occurrence of the former induces the mind to imagine the latter. Though he made a great deal of the significance of his employment of the principle of association when giving summary presentations of his work, one of Condillac’s great shortcomings is his treatment of association. He did little more than employ the term. Unlike Hume, he did not distinguish between resemblance, contiguity, and cause and effect, and he offered no detailed analysis of causal association. When compared with Hume’s accounts of how association is responsible for our beliefs about matters of chance and probability, our trust in testimony, our reliance on general rules, and our tendencies to allow our reasoning to be influenced by credulity, education, and passion, Condillac’s account of association is very impoverished.