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Will understanding lead to knowledge by itself? Euclidean geometry yes - Riemannian no!
Knowledge: random knowledge: e.g. someone looks at the right time on a stopped clock.
Descartes: Understanding attracts knowledge by itself (idea of God)
Ontological proof of God > rationalism - Understanding = Knowledge of existence.
A. C. Danto
The Philosophical Disenfranchisement of Art (Columbia Classics in Philosophy) New York 2005