She seems to have a problem understanding that 11 comes before 12.
Diamond and Silk should have simply told Jackson-Lee that all of this occurred well after our astronauts planted a flag on Mars, to put in proper context for her.
I think she was abusing the precise questioning, giving the appearance of “doesn’t grasp 12 > 11”, to get to some “gotcha” point.
What she DIDN’T understand was that Twitter is not a “direct communication” medium. Just because someone “tweets at me” doesn’t mean I’ll see it, especially if there are in the many thousands of “tweets at me” daily like any public figure gets. It’s like nailing a message on a wall in a restaurant, addressed to me, and then accusing me of denying the message because I happened to eat there.