1859 – 1933
Émile Meyerson (1859–1933) was a Franco-Polish philosopher of science whose central thesis held that scientific reasoning is driven by an innate tendency of the human mind to seek identity—reducing change to conservation and diversity to sameness. Against Machian positivism, he argued that science aims at genuine causal explanation and ontological understanding, not mere descriptive economy. His analyses of physics, chemistry, and relativity theory made him an influential, if unconventional, figure in early twentieth-century epistemology.
Argued in Identity and Reality (1908) that scientific thought is governed by the principle of identity, reducing causal processes to conservation laws
Offered a sustained critique of Machian positivism, insisting science seeks ontological explanation rather than mere descriptive lawfulness
Analyzed the philosophical foundations of relativity theory in La Déduction relativiste (1925), engaging Einstein, Weyl, and Reichenbach directly
Demonstrated through historical case studies that the irrational residue in science—what resists reduction to identity—is philosophically significant
Influenced later philosophers of science including Gaston Bachelard and Karl Popper