Conversation is all about getting one's thoughts across to the audience. One of my pet peeves is having someone correct the speakers words even though they know exactly what is being communicated and why.
People misspeak all the time. You know they aren't dumb. Why do some people persist in correcting everyone's speech. It's not like you haven't stumbled over words in your lifetime.
So if we're at the airport and someone suggests we go over to his hanger, you really don't need to correct him.
Another is using buzzwords, acronyms, or internet shorthand when speaking or using acronyms as words. Some guy at work started using agnostic in reference to some computer components. Or the guy who, while talking about computer hacking, kept using "injecting machine code into the stream".
I'm really not sure what either were trying to convey AND I'm pretty sure neither did they. It just sounds... well... cool.
We're programmed from early on that silence in conversation isn't good. Speakers often fill the void with Umms, Ahhhs, Like, and other dead air fillers to try to connect thoughts. The problem comes when that is all you hear. Even the best speakers have moments.