For some projects specification is also hard because of interdependence between modules or data or parts of the project. To which you might answer "make more te

For some projects specification is also hard because of interdependence between modules or data or parts of the project. To which you might answer "make more tests". And we turn in circles, because it is hard to test something you did not thought of. My experience is that users (customers) even when presented with a prototype (done fast by AI, or previously, in the slow way) can take days to "discover" or "think" about things they wish. Then more days to understand why some wishes can't be done because it breaks other stuff they want. Maybe you have smarter, faster, more experienced and decided users. Then I can only say: good for you, you are lucky!