That the term is confusing is a benefit.

It forces people to really struggle with their domain. What is viable? For whom? How do you pick that group? What's the minimum? Can you go lower than that? How about lower still? If you go too low, will you be getting data that tells you what the thing left out is? It's tricky.

Is that hard? Great. It should be. It took Lewis and Clark 18 months to do a trip I did in a few days. That my trip was fast and easy wasn't a sign they were doing it wrong. Exploration is necessarily hard and confusing. If it weren't, it wouldn't be exploration.