Thanks for the tip! From the wiki page it does look like the thing I'm describing, and I guess I've encountered it many times but never interpreted it as such.

Thanks for the tip! From the wiki page it does look like the thing I'm describing, and I guess I've encountered it many times but never interpreted it as such. [0] https://en.wikipedia.org/wiki/Inverse_problem https://en.wikipedia.org/wiki/Inverse_problem