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Full Idea
Some quantities cannot be measured (such as pain), and some things which are not quantities can be measured (such as certain series).
Gist of Idea
Some quantities can't be measured, and some non-quantities are measurable
Source
Bertrand Russell (The Principles of Mathematics [1903], §150)
Book Ref
Russell,Bertrand: 'Principles of Mathematics' [Routledge 1992], p.158
14123 | Some quantities can't be measured, and some non-quantities are measurable [Russell] |
14158 | Quantity is not part of mathematics, where it is replaced by order [Russell] |
17781 | Real numbers were invented, as objects, to simplify and generalise 'quantity' [Mayberry] |
17782 | Greek quantities were concrete, and ratio and proportion were their science [Mayberry] |