Whenever I'm about to enter a cross-examination scene, I just save the game at that point, then I'm free to just narrow down the evidence through process of elimination. You get about 4-5 tries before you have to restart your game from the save point.
I usually do that, but I got to a point where I was on a roll and feeling cocky. Then ended up feeling frustrated and just kept asking questions 'til I wore down my bar.
Gotta get back on that.

Same goes for the Frog Log.