1. The problem statement, all variables and given/known data "The propositions of mathematics work like this: we believe them first, and only later do we try to prove them." 2. Relevant equations N/A 3. The attempt at a solution I read it in some philosophy book but I'm not sure if it's true because I thought the propositions were not believed nor disbelieved until they were proven. I apologize if I posted in the wrong section. I've just started using forums and I couldn't find any other section that seemed relevant to my question.