> Hobbits delighted in such things, if they were accurate: they liked to have books filled with things that they already knew, set out fair and square with no contradictions.
You can go to twitter for confirmation on what you already think, and amusements, but things that go against your worldview are basically impossible to do in short tweets, so you begin to filter them into a self-reinforcing bubble. And the algorithm notices and reaffirms.
And the self-confirming problem is less about the 280char thing and more about allowing people to create filter bubbles, which is intrinsic to social media.
Point-by-point rebuttals are extremely ineffective, because by the time you move on to the next point, they've already duct-taped the previous one back together. Nobody is keeping score, nobody goes "aha, I counted and he rebutted 7/9 of your points, so I don't believe you anymore!"