I have often used Hillary-Everest as a term for describing an idea that may or may not have any redeeming quality or usefulness. After a bit of research, I have found I mistakenly coined the term based on George Mallory‘s famous quote:

Because it’s there.

… although this quote by Sir Edmund Hillary would still support my term:

Nobody climbs mountains for scientific reasons. Science is used to raise money for the expeditions, but you really climb for the hell of it.

I use Hillary-Everest to describe ideas that are more proof of concept than a requirement and I may still use it out of habit; but, it seems a Mallory-Everest idea may be just as, or possibly more, descriptive.

Which would you use?