Nice article. Not sure if it's significantly different from DH6, but Karl Popper's style of debate might be termed DH7. It's similar to DH6, but first you patch up the opponent's arguments to make the best possible case. Then you find the central point in that case, even if the author doesn't explicitly state it. It's what he really meant to say and might indeed have said if he was on good form. (If there's a stronge…
Actually I thought of making DH7 something similar: not merely refuting what your opponent said, but also explaining what led him to make that mistake. But I wasn't sure, so I left it out.
True it could help him, but only if appreciated. It frequently won't be in public, or between strangers. And it runs a danger of polluting the main discussion. Any personal help is strictly a separate issue than which of the original ideas is true -- the person being helped could still have been right.