One of the founders in my startup was gung-ho to pitch our fledgeling idea to a group of investors, so after reading All In Startup I asked him to present to the other founders first - and it went like this: He would ask for $100k to build our MVP, which we would then go out and convince people to buy. If they didn't need it we would ask for more money to pivot to some other idea. After the 'inevitable' 2nd and 3rd round of financing we would receive, we would then go out and ask customers what they wanted.