Physical fact

Definition and stakes

Portrait of Bertrand Russell Bertrand Russell,  The Analysis of Mind — Lecture VI: Introspection (1921)

“ I attempted to show that what we call a material object is not itself a substance, but is a system of particulars analogous in their nature to sensations, and in fact often including actual sensations among their number. In this way the stuff of which physical objects are composed is brought into relation with the stuff of which part, at least, of our mental life is composed. ”
Source: Wikisource

Portrait of George Henry Lewes George Henry Lewes,  The Physical Basis of Mind

“ To me all your modes of existence are objective aspects, which, drawing from my own experience, I believe to have corresponding subjective aspects; so that your emotions, which to me are purely physical facts, are to you purely mental facts. And psychological analysis assures me that all physical facts are mental facts expressed in objective terms, and mental facts are physical facts expressed in subjective terms. ”
Source: Gutenberg

Robert Hunt,  The Poetry of Science; or, Studies of the Physical Phenomena of Nature

“ All the phenomena of life,—of the vis vitæ or vitality, are beyond human search. All the physical forces, or elements, we may examine by the test of experiment: but the principle on which sensation depends, the principle even upon which vegetable life depends, cannot be tested. Life is infinitely superior to every physical force ”
Source: Gutenberg

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