“[D]oes a community’s belief system actively undermine the trustworthiness of any outsiders who don’t subscribe to its central dogmas? Then it’s probably an echo chamber…
…An echo chamber doesn’t destroy their members’ interest in the truth; it merely manipulates whom they trust and changes whom they accept as trustworthy sources and institutions.
And, in many ways, echo-chamber members are following reasonable and rational procedures of enquiry. They’re engaging in critical reasoning. They’re questioning, they’re evaluating sources for themselves, they’re assessing different pathways to information. They are critically examining those who claim expertise and trustworthiness, using what they already know about the world. It’s simply that their basis for evaluation – their background beliefs about whom to trust – are radically different. They are not irrational, but systematically misinformed about where to place their trust.”
—C Thi Nguyen, “Why it’s as hard to escape an echo chamber as it is to flee a cult.” Aeon. April 9, 2018.
The central idea isn’t that we all need “epistemological reboots”, although it’s often not a bad idea. The central idea is of intellectual humility, such as the possibility that you could be wrong. Philosophical skepticism, like that of Descartes, is taking it to the logical extreme, that not only can you be wrong, you might be wrong about everything. For example, everything we believe is real could be a Matrix-style simulation. We cannot exclude that possibility, even if it isn’t terribly useful in our day to day existence.