|Evidence: proof of the existence and the behavior of objects or of the truth of statements. Evidence can be direct or indirect. See also theories, facts.|
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|A. d'Abro Die Kontroversen über das Wesen der Mathematik 1939 in Kursbuch 8 Mathematik 1967
Evidence/Obviousness/Proof/Hilbert/d'Abro: E.g. triangle, with two perpendicular bisectors. It is clear that the extensions intersect when the triangle lies in the plane. Nevertheless, according to Hilbert, this can very well be denied.
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