Christine did know the 16th Amendment, just not memorized by number.
First, Christine instantly recognized the 17th Amendment and discussed it in detail.
You would not know the 17th amendment off the top of your head, if you had not been reminded of it in this debate.
Christine then asked to be reminded of which debate the numbers went with.
She was given a 1 word reminder of which amendments those were by number.
With a 1 word reminder, she then launched into a detailed analysis and discussion of those other amendments from memory without any more than a 1 word reminder.
Yeah, right. Let's review what she has to say about the 16th Amendment:
"[the sixteenth amendment] gives Congress the power to tax."
Now let's look at the Constitution (not the sixteenth amendment) as it was:
"The Congress shall have power To lay and collect Taxes,[...]"
Ol' Grifter Girl evidently wasn't aware that Congressionally instituted taxes--even income taxes--had been around before the sixteenth. Even Pollock didn't take that away from Congress.
But I'm not a lawyer. Perhaps you know one who can explain how she somehow meant something other than what she said. Maybe that lawyer can teach you what the sixteenth really did.
The rest of us realize she's a dishonest loon with a veil of pseudoconservatism that gets broken every so often when scrutiny gets close.