I can say with some confidence, having been involved in the movement since before the term "Agile" was coined, that it requires neither. I grant that both of t

I can say with some confidence, having been involved in the movement since before the term "Agile" was coined, that it requires neither. I grant that both of those are common, but that's because the median "Agile" implementation quickly devolved into mini-Waterfall with more hip names.