It would be nice to have a sort of an "argument" database, so instead of putting the argument in the comment again, you could just link to the database. Then computers could filter these arguments automatically for the people who already know it. Maybe the arguments could be parametrized, to make the connection to the problem at hand more obvious.
A lot of arguments are repeated endlessly on the Internet, and elsewhere. I've often thought that someone should build a graph database for this. Then maybe we could move past the basic argument and go a little deeper.
I agree. There was Debatepedia (http://dbp.idebate.org), but it seems dead. Unless the arguments are in sort of machine readable format, any filtering will be difficult. The problem is the format - I believe AI researchers still struggle with that one.
Ah well.. a man can only dream.