A great way to triangulate on software you want: compare to existing apps.
"I want to make an app for cofounders to find each other."
"OK, like tinder for cofounders"
"No, less like Tinder because the way they look doesn't matter so it shouldn't be as photos centric".
"So more like LinkedIn for cofounders?"
"I guess, but less about strutting and resume building, more about the kinds of personality overlaps."
When you can take known existing exemplars that are very different, you get very fast triangulation by comparing to them.