How can you have a miscarriage and not know it? Learn how a missed miscarriage can happen without the usual symptoms of pregnancy loss. Medically reviewed by Renita White, MD A missed miscarriage, ...

Understanding the Context

Natalie Joy has suffered another miscarriage while expecting a baby with husband Nick Viall. The co-host of The Viall Files podcast, 26, revealed that she "miscarried again" in a candid Instagram ... Recently one of my friends told me that there is distinct difference between 'know of something' and 'know about something' expressions. 'know of' is used when you have personal experience with wha...

Key Insights

"Know about" vs. "know of" - English Language & Usage Stack Exchange Why do you think that He doesn't know him from his schooldays means that he does know him? It would only have that sense if you added something like In fact, he first met him at university. Should I use "did you know" or "do you know" to introduce a fact? I've only seen "did you know" in action.

Final Thoughts

My logical deduction is that before the "question" (which is not much of a question because you're not asking for an answer), you wouldn't have been sure whether the listener'd known about what you're about to say or not. Should I use "did you know" or "do you know" to introduce a fact? What is the correct usage of phrase "you don't know what you don't know"? Can it be used in formal conversation/writing?