I call it bass-ackwards when (and I freely admit that I may have this wrong because, as I said, the various attempts to explain the system tend to suck because they're all breathlessly talking as if narrative, rules-light systems are new and unique to PbtA) you say what you're going to do and then look up a list of approved "moves" to see which is least distorted when applied to the situation. I don't really find menus of permitted moves liberating or free-form. I find it rather constraining and ugly.