by Thia Halmades on Sun Apr 18, 2010 1:23 pm
This is one of those cases of "Yeah, that's not the best wording, but I couldn't find a better way to say it." What Revelation of Evidence really does is act as a holodeck that moves under its own power. The phrase "can't learn anything new" means (again, hard to explain and I'm still sluggish this morning) that casting the spell can't solve the murder. By the time this spell is cast, the caster already has 95% of the information they need; this lets them put everything into perspective.
Frex: You know that Miss Scarlet killed Professor Plum in the Kitchen with the Revolver. You have other pieces of evidence that you haven't fully grasped. By casting Revelation of Evidence, you learn that your piece of rope was used by Mrs Peacock to choke Miss Scarlet which caused the gun to fire at the odd angle it did. You could, reasonably, have pieced that together on your own, but didn't yet.
The best, out-of-game-speak way to describe the spell is a Plot Compression Device. "Okay GM, I did all my research, I think I know what's going on, but now I'm going to cast Revelation of Evidence to see it in action and put it together." Hence, the CHARACTER has learned "nothing new." They only have clarity. The PLAYER, however, may in fact get told, "Based on your evidence, you see Mrs Peacock choke out Miss Scarlet, which causes the gun to fire, and the a very surprised look on Prof Plum's face suggests, along with the letters between the two and other evidence, that she had no motive to kill him. Miss Peacock did, however, based on this other evidence, and now you are certain that you know how it all went down."
See? Rather than stabbing around and guessing and playing 20 questions with the GM, he can just compress the plot device you need and say "Here ya go."
Does that make more sense?
~DEM/TH