Underdeterminism

A philosophical principle stating that empirical data can never uniquely determine a single theory. Multiple, logically incompatible theories can always be constructed to account for the same set of observations. The choice between them is not dictated by the data alone, but by extra-empirical factors: metaphysical commitments, aesthetic preferences, social influences, and ideological presuppositions. Underdeterminism is a well-established principle in the philosophy of science, but it is often forgotten when scientism confronts spiritual experience, anomalous phenomena, or challenges to the materialist orthodoxy. It restores epistemic humility, reminding us that data are not self-interpreting and that theories are always underdetermined by evidence.

Example: "When neuroscience shows that a mystical experience correlates with temporal lobe activity, the reductionist declares: 'This proves that spiritual experience is just neural firing.' But underdeterminism shows that the data are also compatible with the transmission theory—that the brain is a receiver, not a generator. The reductionist conclusion is not science; it is a metaphysical choice."

Underdeterminism by Abzugal Nammugal Enkigal July 12, 2026