Is it possible to take a rainbow refracted through a crystal and de-fract it back together? And what would this process be called? I tried googling but it kept thinking I meant "diffraction".

Speaking of which, what if you filtered some of the wavelengths out. Is there any other examples where you can get back to a "whole" or "original" without having all the orignial pieces (or wavelengths in this riff).

Something about this makes me think of stem cells, or replication from that sense... you can lose some members of a species but the DNA is still within other members of the tribe....

Hmmmm. More thinking.