I know that the likes of fact checking and checking for hypocrisy draws eye rolls in the present environment (which in and of itself I find disappointing), but I do think an interesting variation on it would be to track what underlining principle is associated with any particular argument and to track adherence to principles over time. Of limited utility in an information ecosystem that's deeply indifferent to litigating disagreements on the basis of factual accuracy, but I feel like bsing your way out of inconsistent principles is at least harder.