When I was younger I had a bad habit of taking what information I did know and then piecing it together to try and fill in what I didn't know, then stating that confidently. Many times I was wrong. In fact, most times I was wrong and not even close. But I was expected to be that way in order for people to listen to me. I was doing this almost until I was twenty because of that expectation.
The one good thing that came out of this maladapted behaviour is that I learned to take my hunch, piece together the information, and then use that to go looking for what I didn't know. In a way it got me addicted to constantly learning, something I never managed in school.