Pedantic is an insulting word used to describe someone who annoys others by correcting small errors, caring too much about minor details, or emphasizing their own expertise especially in some narrow or boring subject matter.

What is a pedantic personality?

A pedant is a person who is excessively concerned with formalism, accuracy, and precision, or one who makes an ostentatious and arrogant show of learning.

What type of people are pedantic?

Irregardless, pedants are individuals who make excessive displays of their own knowledge based on formal rules and overly precise details with an enormity that disregards common sense. Pedantry represents a behaviour and as such can potentially be explained through psychology/neuroscience/scientific just-so stories.