[lasdfas]

I think "some" is very few (if any at all) in my experience. If you are generally looking for knowledge or not sure, you preface with "I may be wrong", "I am not an expert" or other such phrases, but most often people state wrong information as facts with no caveats. It's probably some combination of over confidence and ignorance.

[ksec]

That is one of the problem with online discussions. Would be great if there is a discussion on how to fix this.

[fwip]

HackerNews tech bros, chasing that upvote validation. When you've been rewarded all your life for being smart and right, you tend to think your guesses are right and announce them loudly.

[qwsxyh]

HN users, much similar to many places on the internet, fall into the trap of believing that because they hold an opinion on a topic, they are therefore right.

[spacemanmatt]

Everything I know about the Dunning-Kruger effect, I learned on HN.

[bodi]

And no site featuring up/down votes, usernames, and publicly displayed logins will ever pursue the truth as a first cause, only to enable the ego.