1. Hear his pitch and reasoning for what he does, then objectively break any fallacy he may have that doesn't fit the norm of solid advice (which is subjective

1. Hear his pitch and reasoning for what he does, then objectively break any fallacy he may have that doesn't fit the norm of solid advice (which is subjective since even weird things can happen in wonderful ways). Link him to proof by people who have been successful and why his thinking might be wrong. 2. Tell him to get more involved with the startup community and in some sense, read up on things he doesn't understand. Few other cofounders sound like a bit more than necessary but since I don't know the background on this, I won't comment. 3. If he won't listen and continues doing what he wants to do, let him. He has to learn on his own. The biggest thing about any entrepreneur (the successful ones) is they must be teachable, adaptable, and constantly changing. If he is fixated in his ways, nothing you do will help.