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Quotation from An Enquiry Concerning Human Understanding by David Hume
“All the objects of human reason or enquiry may naturally be divided into two kinds, to wit, _Relations of Ideas_, and _Matters of Fact”
An Enquiry Concerning Human Understanding, Section IV, Part I (Project Gutenberg #9662)

The opening of 'Hume's fork', distinguishing demonstrative knowledge from empirical knowledge.
Citation: "All the objects of human reason or enquiry may naturally be divided into two kinds, to wit, _Relations of Ideas_, and _Matters of Fact" — David Hume, An Enquiry Concerning Human Understanding, Section IV, Part I (Project Gutenberg #9662). (id an-enquiry-concerning-human-understanding-q3)
Portrait: David Hume, Allan Ramsay, Public domain.
