If it isn't Ivanka, where is she to dispute it? If she doesn't dispute it, does that mean she's in on it? If so, why not just appear?

Seems like a lot of work, if that's the case.

She could also be setting herself up as a "skeptic", so that when further evidence surfaces she can become a "believer" and help others change their mind. That's a big guess on my part, but it seems plausible. Time will tell.

Either way, it's political theater. Show trial, indeed.