In any not-completely-fantastical scenario, Beauty’s experiences on Monday are very unlikely to be repeated exactly on Tuesday, so “experiences y” and “experiences y at least once” are effectively equivalent. Any argument that relies on her sensory input being so restricted that there is a substantial probability of identical experiences on Monday and Tuesday applies only to a fantastical version of the problem. Maybe that’s an interesting version of the problem (though maybe instead it’s simply an impossible version), but it’s not the same as the usual, only-mildly-fantastical version.
In any not-completely-fantastical scenario, Beauty’s experiences on Monday are very unlikely to be repeated exactly on Tuesday, so “experiences y” and “experiences y at least once” are effectively equivalent. Any argument that relies on her sensory input being so restricted that there is a substantial probability of identical experiences on Monday and Tuesday applies only to a fantastical version of the problem. Maybe that’s an interesting version of the problem (though maybe instead it’s simply an impossible version), but it’s not the same as the usual, only-mildly-fantastical version.