1. As DEMONSTRATION is the showing the agreement or disagreement of two ideas, by the intervention of one or more proofs, which have a constant, immutable, and visible connexion one with another; so PROBABILITY is nothing but the appearance of such an agreement or disagreement, by the intervention of proofs, whose connexion is not constant and immutable, or at least is not perceived to be so, but is, or appears for the most part to be so, and is enough to induce the mind to judge the proposition to be true or false, rather than the contrary. For example:
1. Frogapena elkarrekiko lotura iraunkor, aldaezin eta ikusgarria duten froga baten edo gehiagoren bitartez bi ideiaren arteko adostasuna edo desadostasuna erakustean datzan bitartean, probabilitatea adostasun edo desadostasun horren itxura besterik ez da, elkarrekiko lotura iraunkorra eta aldaezina beti ukan ez arren (edo behintzat guk horrela hauteman ez arren), gehienetan horrelako lotura daukaten-edo daukatela diruditen-frogen bitartez; eta hori aski da gogamenak proposizio jakin bat egiazkoa edo faltsua dela-kontrakoa dela baino ziurrago-juzga dezan.