A lot of people decry poor standards of reading comprehension, and my pet hypothesis is that many readers don't actually parse and evaluate sentences, but just let their eyes suck in the words and have a good guess at what it's supposed to mean.

If you read a legal contract it's important to understand every word. In most cases it isn't. If you focus too much on details you can also lose context.

Years ago when I was a forum moderator I was reading forum posts in a way where I could decently reidentify a banned member that reregistered. On LW I now don't seem to have that ability anymore to the same extend. My focus is elsewhere.

You trade different ways of reading against each other.