I disagree that another person's full-time commitment is the greatest validation your idea can have.<p>Sure, it's one data point. It's one validation. But both of you may be "delusional" in the sense of thinking you have a valuable idea when you really don't (yet). Generally speaking. This happens a lot when things change, and startups pivot, but the team remains the same.<p>I was curious why your post didn't include anything about reaching out to users, user testing, doing customer development, etc. I would say THAT is your starting point to see if your idea is validated for product/launch fit, and then go for product/market fit.<p>The greatest validation is product/market fit. You have growing number of users, traction, money flowing in... and so forth. that is the greatest validation.<p>You can sell yourself and your vision pretty well to someone else to become your cofounder, but I am not convinced it's the "greatest validation" your idea can have. Especially since your "idea" most likely will go through iterations and change.<p>I do agree, though, that having a cofounder really helps. But not for the reasons you said.