https://en.wikipedia.org/wiki/Reality_tunnel

The human brain is one of the most powerful filtering devices that exists. If you train it not to see something, that something can effectively disappear for you. Families, cults, and even societies quite often work on this premise.

this applies to digital products too. every app is a framing machine: it decides what's worth your attention and what gets filtered out. the feed algorithm is the most obvious reality tunnel, but even a todo list does it.

what's interesting is how few people notice the framing itself. you can spend years inside a particular app's reality tunnel and never question why those things are the ones you're paying attention to.