We can test this.
It is within any number of ranges of probability that one or more DP participants are active cannibals. In fact, there is a non-zero chance that one DP contributor has eaten human flesh.
I state as fact that the poster using the handle
@DrewPaul fits within the parameters of these probability sets.
Therefore, my assertion, were I to offer it, that
@DrewPaul is a cannibal would serve as evidence that
@DrewPaul is the cannibal.
@DrewPaul, using
@DrewPaul's reasoning, is therefore necessarily a cannibal.