Nguyen writes that “current usage has blurred [a] crucial distinction” (par. 3) between epistemic bubbles and echo chambers. How does Nguyen reframe the subject of filters by focusing on these...

Nguyen writes that “current usage has blurred [a] crucial distinction” (par. 3) between epistemic bubbles and echo chambers. How does Nguyen reframe the subject of filters by focusing on these phenomena? What, specifically, does he want his audience to understand?