"when someone is convinced that he knows all he needs to know and merely pontificates to others"

It seems to me that Don Firth does that. What have I pontificated on?

I am sorry, I did not know that Ebbie was an Alaskan.

"You haven't seen it all or talked to everyone."

And I never made that claim.

I said I have been there and I have talked to Alaskans.

"don't say that you learn more but talking to them in person" Ok I won't say that.

Who has seen it all or talked to everyone?