And the opposite is exceedingly frustrating: when someone starts explaining something in terms of base concepts you've never even heard of, and you have to stop

And the opposite is exceedingly frustrating: when someone starts explaining something in terms of base concepts you've never even heard of, and you have to stop them every few seconds to fill in the blanks (and then some of those explanations have holes of their own, etc). In some cases you may be so new to a topic that you don't even know which questions to ask, so it's impossible for you to shepherd them into telling you what you need to know.