Also, the 'centaur tower' interpretation came from 'Unearthed Arcana' which is basically D&D's 'experimental' branch, and never made it to the full release, but that's kinda boring.

It basically only works if you ignore the carrying capacity rules which are a more general rule, so tho you could argue you can stack infinite amount of centaurs, the bottom one cannot carry infinite amount of mass. It's a 'gotcha' only if you don't know the broader rule or if you're not making a good faith argument. However I appreciate it as super funny concept and a great example

Did someone 'Well actually' the centaur tower already?
And if not, would you like me to?

ActivityPub is a social API and federation protocol. One way to think about questions like the ones you ask is could it be applicable to an API or federation protocol?

In this case, yes. We already have a few activity types in the ActivityPub spec that aren't CRUD, and we have a whole Activity Vocabulary with even more. We can and should distribute them.

The definition of centaurs in D&D says that a centaur can carry a medium-sized creature on its back -- the equine part.

But a centaur is a medium-sized creature. Does that mean that a centaur can carry another centaur on its back? And could *that* centaur carry another centaur on its own back?

Taken to the extreme you get a centaur tower - an infinite stack of centaurs. They'd probably do even better than a dog at basketball!