That brings back memories of the Klinton Follies of the nineties.
I believe the point is that you can only get away with that game if you’re appearing before an investigative panel that either is being run by your own party and wants to get you off, or it’s being run by milquetoast RINOs who might enjoy giving you a hard time but who don’t want have to man up and do something unpleasant that they’ll have to defend, like indicting you.
What happens if the guys running the subcommittee refuse to play ball?
From Clear and Present danger:
The line you need to learn is, “I have no recollection of that, Senator.”