I'm a little confused by the axioms.
Surely the "unique" folds in the first few examples should allow for the mirror-image fold, both mountain and valley bringing the points together?

And Axiom 5 doesn't even work if P1 lies in a circle touching L1 and centred on P2!

Axioms 6 and 7 don't hold if L1 and L2 are parallel.

So, not exactly Axioms, then.

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