an.2.21 Aṅguttara Nikāya (Numbered Discourses)

The Chapter on Fools

21
“Mendicants, there are two fools.
What two?
One who doesn’t recognize when they’ve made a mistake. And one who doesn’t properly accept the confession of someone who’s made a mistake.
These are the two fools.
There are two who are astute.
What two?
One who recognizes when they’ve made a mistake. And one who properly accepts the confession of someone who’s made a mistake.
These are the two who are astute.”