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3 ideas
12211 | It is plausible that x^2 = -1 had no solutions before complex numbers were 'introduced' [Fine,K] |
8631 | Cantor says that maths originates only by abstraction from objects [Cantor, by Frege] |
12209 | The indispensability argument shows that nature is non-numerical, not the denial of numbers [Fine,K] |