Know-it-alls sometimes say things that are condescending to others who don't possess the same information. Here are 12 phrases people who act like they know it all use constantly.

But, I was right! (And, I now know I need some help for reining in my know-it-all tendencies.) If you, too, feel you’re a know-it-all, and you suspect it’s driving everyone in your life crazy ...

Remember, your role as a leader isn’t to have all the answers. It’s to create the conditions where the best answers can emerge. That starts by listening—intently, intentionally, and with ...

Unfortunately, most employees encounter at least one know-it-all coworker or boss at some point in their career—and they’re not always the easiest people to work with, says Nancy Collamer, a ...

2. ‘I could’ve told you that’ fizkes | Shutterstock. The next low IQ phrase people use when they act like they know it all is, "I could’ve told you that." ...

The first step is identifying what type of know-it-all you’re dealing with. Over the years, I have had many chances to mentor ...

If you think the know-it-all is wrong, present contradictory data in a matter-of-fact way. Don’t directly challenge their expertise, but suggest another way to view the situation.

Koerner has written the Mr. Know-It-All column in every issue since July 2007. He’s fielded questions about everything from the benefits of auto-tune to plots to kill your neighbor’s weeds.