Uses of The Point-Line-Plane Postulate
Generalisation of the Dimension assumption:
Given an n-dimensional object in an (n+1) dimensional space, there exists at least one point in the (n+1) dimensional space that is not within the n-dimensional object.
Applications of this generalised assumption include visualisation of higher spacial dimensions as described by String theory and M-theory.
Read more about this topic: Point-line-plane Postulate