@evan evan, not only did i read your book, i also reviewed it for o'reilly at your request. the topic at hand is about reply notifications and reply acknowledgements, two things which are not specified in the activitypub TR. we have Like+likes and Announce+shares, and to some extent we have Follow+followers, but everything else is left as an afterthought perhaps stuffed in a Create. i'm very confused what this kind of response is supposed to mean.