It's like being in love right? "You just know." Startup School's biggest lesson has been "just launch and find out." You can wonder if you'll have product mark

It's like being in love right? "You just know." Startup School's biggest lesson has been "just launch and find out." You can wonder if you'll have product market fit forever, but you'll never know for sure until you have people paying for your product and telling their friends to sign up. It's by nature an ephemeral thing, startups are not yet a pure science.