1) What's the theory called? (eg, "QAnon.")
2) Who's got a good rundown of the state of play?
A) Seeks evidence to prove an unshakeable point of faith (in this case, NO COLLUSION!)
B) Ignores/dismisses all contrary evidence
C) Makes ample use of "poisoned trees." If one element can be discredited, then the whole thing is invalid.
E) Anybody attacking the conspiracy theory is part of the conspiracy (Cabal of FBI/CIA/Dems/Liberal Media!)
F) Memory-holes any prior claims if discredited