But that's just limiting the scope of development effort on a project to reduce time/cost. It doesn't mean that you believe anything you don't support is imposs

But that's just limiting the scope of development effort on a project to reduce time/cost. It doesn't mean that you believe anything you don't support is impossible to happen. If an automotive engineer put a battery in an electric car that gave a capacity of 200mi trip, no-one would say "Engineers believe every road has a charging station at least every 200mi".