accidental generalization See LAWLIKE GENERAL -. IZATIO. accidentalism, the metaphysical thesis that the occurrence of some events is either not necessitated or not causally determined or not predictable. Many determinists have maintained that although all events are caused, some nevertheless occur accidentally, if only because the causal laws determining them might have been different. Some philosophers have argued that even if determinism is true, some events, such as a discovery, could not have been predicted, on grounds that to predict a discovery is to make the discovery.
The term may also designate a theory of individuation: that individuals of the same kind or species are numerically distinct in virtue of possessing some different accidental properties. Two horses are the same in essence but numerically distinct because one of them is black, e.g., while the other is white. Accidentalism presupposes the identity of indiscernibles but goes beyond it by claiming that accidental properties account for numerical diversity within a species. Peter Abelard criticized a version of accidentalism espoused by his teacher, William of Champeaux, on the ground that accidental properties depend for their existence on the distinct individuals in which they inhere, and so the properties cannot account for the distinctness of the individuals.
See also DETERMINISM , IDENTITY OF INDIS- CERNIBLE. W.E.M.