Take what I'm about to say with a massive grain of salt as I don't know you, your cofounders, any back story you guys may have, or anything else with the follow

Take what I'm about to say with a massive grain of salt as I don't know you, your cofounders, any back story you guys may have, or anything else with the following opinion. My personal opinion is if there's doubt, usually, you should probably back away. Take it from someone who has worked with many people. The times that I've had success with those I've worked with, there were never any doubts. Debates, disagreements, among other things are common but doubt was not one of them. If you have doubts, its a sign of potential problems not worth having that could escalate or unravel the startup later.