possibly a stupid follow-up question:

Since it would detect points that touch (are coincident) and points to a computer do occupy space to within whatever tolerance is being used, does the same apply to surfaces that are coincident?

Mathematically a surface has no thickness but we are in the world of a program and computers so is are two surfaces that are "touching" (within the tolerance the technology) considered intersecting or to they actually have to pass through each other rather than touch?

I hope to what ever higher power you follow that I made some sort of sense.

mjs