Nachmani, Open and Speak
When a group of sages agreed that whoever could not be refuted would lead them, only Abaye's words held firm.
It is told that four sages once sat learning together: Abaye, Rava, Rebbi Zeira and Rabbah bar Masna. They were a fine group, but they had no head, and a group of learners needs someone to lead.
They did not cast lots or take a vote. They decided to let the Torah choose. Whoever says something that cannot be refuted, they agreed, will be our head.
One after another, each of them offered an idea, and one after another the others found the weakness in it. Every statement fell, until it was Abaye's turn. He said his piece, and the others searched and questioned, but no one could find a flaw. His words stood.
Abaye lifted his head a little. Rabbah saw it, and called him by his name: Nachmani, open and speak. Begin the shiur.
In that circle of friends there was no envy and no politics. The sages wanted only the truth, and they were glad to follow the one who could lead them to it. The orphan who had grown up in another's home now opened the learning for his companions.
Source: Gemara, Horayos 14a (Talmud Bavli); English: The William Davidson Talmud (Koren–Steinsaltz translation), Horayos 14a.
In your next disagreement at home, at work or in your chavrusa, try the young sages' way. Before arguing for your side, say: Let's see whose idea holds up best. Then really test your own idea as hard as you test the other person's. If theirs is stronger, say so out loud. Following the truth, even when it comes from someone else, is how good learning and good friendships grow.