Abstract
I argue that when it comes to understanding other people, humans have a problem that involves a combination of poor imagination and excessive trust in this imagination. Often, the problem has to do with what I call "runaway simulation" - clinging to the assumption that another person resembles you despite glaring counter-evidence. I then argue that the same type of problem appears intra-personally, as we fail miserably to imagine potential and future selves. Finally, I argue that this fact goes a long way to explain the phenomenology of many transformative experiences, an explanation that does not require a special kind of knowledge to exist along the lines of "knowing what it's like".