evidentialisme

Evidentialism is a family of epistemological theories according to which the justification of a belief depends solely on the available evidence. The central claim is that a proposition is rational to believe only if there are adequate reasons or data supporting it; factors such as emotions, social pressure, or habit do not by themselves confer justification. In its stronger forms, evidentialism holds that evidence is the sole determinant of justification, while weaker variants allow non-evidential factors to influence belief in other domains or under limited conditions.

The view is often contrasted with coherentism, which ties justification to coherence within a system of beliefs, and reliabilism, which ties justification to the reliability of cognitive processes rather than to evidence per se. In philosophy of religion, evidentialism asks whether belief in God requires positive evidence; proponents argue that rational belief should be anchored in evidence, while critics point to cases where evidence is incomplete, probabilistic, or where beliefs are considered properly basic and do not require evidence in the ordinary way. Notable discussions include William Clifford’s maxim that it is wrong to believe on insufficient evidence and Alvin Plantinga’s reformed epistemology, which argues that some beliefs can be properly basic and justified independently of evidence.

Critics contend that evidentialism can be overly demanding, failing to accommodate everyday inference, epistemic virtues, or the idea that some beliefs arise from non-evidential foundations. Proponents respond that a clear evidential standard helps prevent credulity and irrational conformity, while allowing for revision in light of new or stronger evidence.