Axiom:Propositions of Incidence/Space
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A (three-dimensional) space is completely determined by any four distinct points of that space which are not coplanar.
- 1952: T. Ewan Faulkner: Projective Geometry (2nd ed.) ... (previous) ... (next): Chapter $1$: Introduction: The Propositions of Incidence: $1.2$: The projective method: The propositions of incidence