George Berkeley
Berkeley's razor

A general practical result—which I propose to call "Berkeley's razor"—of analysis of physics allows us a priori to eliminate from physical science all essentialist explanations. If they have a mathematical and predictive content they may be admitted qua mathematical hypotheses (while their essentialist interpretation is eliminated). If not they may be ruled out altogether. This razor is sharper than Ockham's: all entities are ruled out except those which are perceived.
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