So, as a general rule of thumb: If you see THREE judges, you should be VERY suspicious that at least one of them is fake.
By default, there should only be one judge (assuming no shaman, no doppleganger)
If you have three, then you EXPECT 2 of them to be lying.
During any given hand, I check the current deck, and try to calculate how many double ups I expect to see, and whether the double ups will tell the truth (Shaman or doppleganger), or if they will like (minions or drunks)