[runald]

The word completely does over-assert that quote, but it's disingenuous to pretend that the quote does not follow from your overall point. People with good "theory of mind" would supposedly read between the lines, but I guess it was never that simple. Spoiler alert: there's no such thing as one true generalized theory of mind.

[mirror_neuron]

GP is using “theory of mind” as a technical term with a specific meaning: https://en.m.wikipedia.org/wiki/Theory_of_mind

[BurningFrog]

Reading between the lines is a whole different thing.

"Theory of mind" means, among other things, having a good mental model of what other people know and don't know.

Obviously, without understanding what piece of information the other person is missing, it's very hard to explain it to them.