"the posts made by people I follow" is a pool (regardless of what you want to claim) and "that subset in the order in which they were posted" is an algorithm (r

"the posts made by people I follow" is a pool (regardless of what you want to claim) and "that subset in the order in which they were posted" is an algorithm (regardless of what you want to claim). Presenting a subset of content (the people you follow vs. literally all the content) in any particular order requires an algorithm. It's not a particularly advanced algorithm, but an algorithm nonetheless. Consider even that most people would throw a fit if what you just asked for was the case and the only case. Most people probably want "most recently posted" given no other options, which is a different algorithm and the reverse order that you say you want.