If you try to debunk an opponent, they will see you as an opponent and try to debunk your facts too, trying all the harder the more successful you are. Unless someone is watching, neither conversation partner is likely to leave happy or convinced.

Note: there may be times you can usefully catch, prove wrong and embarrass an opponent, in front of an audience. Just remember that debunking involves a bit of embarrassment: don't do that by accident, don't do that if you hope to connect.