I find an exchange like the following hard to imagine: Technical Cofounder: We can't realistically do <foo> because it'd have to process a huge amount of data

I find an exchange like the following hard to imagine: Technical Cofounder: We can't realistically do <foo> because it'd have to process a huge amount of data and it'd take way too long. Ignorant Non-technical Cofounder: I don't believe you! You're just a dumb programmer. Enlightened Non-technical Cofounder: Oh, you're right. I can see that it's O(n^2). My advice, for what it's worth, is to find a technical cofounder you trust, and then give him the benefit of the doubt on any features he says are unimplementable.