Abstract

Władysław Witwicki’s suppositional conception of religious faith was presented extensively in his book La foi des éclairés [Faith of the Enlightened] (1939). The aim of this work was to investigate how so‑called enlightened people (i.e. those with at least a secondary education) reconcile secular knowledge with religious faith. The empirical research presented by Witwicki was based on a number of concepts, such as judgment, supposition, psychological principle of contradiction, sincere belief and insincere belief. Witwicki concluded that the faith of enlightened people consists of suppositions which are held against secular beliefs. However, this conclusion was not sufficiently justified and can only be applied to a certain group of believers.