Most of the usage of "matter-of-factly" that I've seen is to describe a manner of speaking - "He said, matter of factly,...", etc.
A friend brought up the following usage, which seems wrong, but I can't pinpoint exactly what is wrong. "Matter of factly, I don't know. I know from my dad's experience."
What's the view on this?
Couple of points:
- The adjective form "As a matter of fact, I don't know. ..." seems correct.
- Similar usage of literally works: "I literally don't know." or "Literally, I don't know"