Certainly, who your friends are matters a lot in social media. But the fact that the algorithm’s narrowing effect is nearly as strong as our own avoidance of views we disagree with suggests that it’s actually a pretty big deal.
Did Facebook’s Big Study Kill My Filter Bubble Thesis?

Good point. “Avoidance of a challenging view” is the actual “individual choice” when it comes to a single post. And the fact that the filtering algorithm anticipates & amplifies that “avoidance of challenging views” with almost equal strength is worrying.

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