I once read somewhere (can’t remember where) that, if at 30 you still think that logic alone is going to convince people, you’ve got a serious problem. And I think this article goes deeply into explaining why.
"I find for myself that my first thought is never my best thought. My first thought is always someone else’s; it’s always what I’ve already heard about the subject, always the conventional wisdom. It’s only by concentrating, sticking to the question, being patient, letting all the parts of my mind come into play, that I arrive at an original idea."