Ⓐ presumes the problem is the echo chamber. You and your uncle each consume too much news that aligns with your viewpoints, and exposure to the other side’s arguments will give you a new appreciation for them. Ⓑ presumes the problem is a lack of facts and fact-checking. The reason your uncle doesn’t agree with you is that he’s been told a bunch of lies, and if you can only show him the truth, debate-style, you can come to a new understanding. (He thinks the same thing about you, by the way.) Ⓒ presumes the problem is the absence of humane contact. You spend too much time around people who agree with you about everything, and that’s led you to reduce the other side to a caricature. Get in the same room with some agreed-upon ground rules and talk it out — you’ll realize it’s a person on the other side of the aisle, not an ideology.