Should an edit to any wiki post bump the entire topic?

Am I correct in assuming that to have an update in a wiki bump the topic to the top of the list (as discussed here), you have to disallow replies (because after 1st reply a wiki update will no longer bump the topic). What if you have an and/or situation? Either you update the wiki, or add an additional comment… and always the topic will bump to the top of the list.

Edit: Correction. Changed ‘either/or’ to ‘and/or’.