Most startups fail cos the founders broke up or cant keep going on anymore, we keep pointing to lack of demand or lack of money as why a startup failed but to be honest most startups start from a situation where there is either a lack of money or a lack of demand so technically speaking most startups start from a failed situation.

Theres no pass fail on a piece of paper as we're used to in school for startups, its more where you've given up and dont want to continue.