Frank Underwood wishes to woo David Xanatos as a campaign donor. So they sit and talk.

In scenario one, Nether man knows each others main secrets.

In scenario two, Xanatos has all season of HoC in his head and Underwood has the series Gargoyles and the continuing comics in his head. Neither man knows the other knows their secrets.

In scenario three, as two but they know each other knows the others secrets.