Rationality is believing true things and making good choices.
This phrasing isn’t quite as precise as it could be, but it communicates the gist of both epistemic and instrumental rationality in very simple language. I use this wording when communicating what rationality is to non-rationalists, and it seems to do its job well enough. Maybe other rationalists will find it useful too.
A Simple Motto
Rationality is believing true things and making good choices.
This phrasing isn’t quite as precise as it could be, but it communicates the gist of both epistemic and instrumental rationality in very simple language. I use this wording when communicating what rationality is to non-rationalists, and it seems to do its job well enough. Maybe other rationalists will find it useful too.