Ugg I have one of these coworkers now. Very junior, relatively new, and 200% a jerk.
The best way to handle it is if you have to reply talk to them like whatever they said was literal then ask for an artifact.
They want to sow seeds of doubt to hurt your credibility. So, you innocently ask for the receipt.
“Thanks for the catch Larla. I have the document up and I’m on page 6, paragraph 3, line 4. It says…Can you take a screenshot and send where it says xyz…”