HN's search function is good! I just looked for "scott_s Steven Novella", changed it to look at comments (default is stories, which, unsurprisingly, there are n

HN's search function is good! I just looked for "scott_s Steven Novella", changed it to look at comments (default is stories, which, unsurprisingly, there are no hits), then sorted by date. It's usually easy to find a comment you or someone else made by just searching for the username, then some keywords.