> Eh, I think this is spurious. The specific post you're replying to is about a signal that seed funders can use to predict if founders have what it takes. Seed funders can't really use the signal of "did they get VC money?"

That's a fair point, but my point was really: if they can convince you as an investor to actually put in money, then they certainly have sales skills that outclass those of acquiring some random co-founder. Admittedly, maybe they don't have the technical skills, or perhaps you as an investor lacks the specific skills to evaluate those in the way that a potential co-founder might be able to, but (as I mentioned) that's what technical due diligence is for anyway.

> Also, technical proof of concept is definitely a positive signal, but is not at all sufficient to make a reasonable investment bet.

I don't see what you are saying. Are you saying that getting a co-founder is more sufficient than a technical proof of concept to make a reasonable investment bet? I wasn't arguing that one should make an entire investment based solely on one factor (the product itself).

My point is simply that: being able to sell a co-founder on the idea or product seems to be an easier lift than selling an investor to invest real money in the idea or product, irrespective of other factors.

My idea was more that one cofounder probably had an original idea, but then got another person to work with them on it. In the best case both people are working on the project in large part because they want to work with the other person. The project the two work on probably evolves enough between the two people that at the point they get to talking to an Angel, they can both claim full half credit and feel like equals in the endeavor. People who can do this are much more likely to be able to grow a business quickly like Y-Combinator tries to do.