“Listen, Easy now,” said the old man gently. “I know, I know. You’re afraid of making mistakes. Don’t be. Mistakes can be profited by. Man, when I was younger I shoved my ignorance in people’s faces. They beat me with sticks. By the time I was forty my blunt instrument had been honed to a fine cutting point for me. If you hide your ignorance, no one will hit you and you’ll never learn.”
You want to hone your reasoning powers to a fine cutting point? Make people force you to reason in the most strenuous ways possible, and do the same for your friends.