I have to admit, even I'm not sure what a "hacker mindset" is. As one technical cofounder to another, I think the most important thing is for you to understand the business side. Most importantly, how interpersonal skills matter and how emotions play out in a business setting. Beyond that, a solid understanding of scientific approaches to understanding is the second most important. Being able to tease apart correlati…
If they did something...and that thing was successful then by definition that thing they did...it works, right?