I agree, to debunk rapscouter we'd have to debunk:
36% of his first cluster
40% of his second cluster
36% of his third cluster
36% of his fourth cluster
or 36% of his fifth cluster.
All other leakers just need one out of about 15 or 20 things, or between 5% and 7% of their "prophecy". Not only that, but just look at the lists. The majority of things are things that can't be proven wrong without the game. There won't be a Dojo update saying "the following things are not in Brawl", so let's see how much of his prophecy is actually debunkable:
3/11 in his first cluster (SSB on VC, Delay, and 3rd third party character)
2/10 in his second cluster (Falco and Luigi)
2/11 in his third cluster (Ganondorf, Marth and Roy)
2/11 in his fourth cluster (Ness, Captain Falcon)
2/11 in his fifth cluster (Mewtwo, PT Rival)
Everything else can be scoffed off as either misplaced (revealing a supposed 4th third party character first instead of the 3rd, thus throwing him off), or things that can't be debunked without the game. It is impossible to debunk him 100% without the game, and that's just too coincidental to have not been done on purpose.