Contemporary platonism is also more open to the idea of there being infinitely many abstract objects, as numbers or propositions might qualify as abstract objects, while ancient Platonism seemed to resist this view, possibly because of the need to overcome the problem of "the One and the Many". Thus e. g. in the Parmenides dialogue, Plato denies there are Forms for more mundane things like hair and mud. However, he repeatedly does support the idea that there are Forms of artifacts, e. g. the Form of Bed. Contemporary platonism also tends to view abstract objects as unable to cause anything, but it is unclear whether the ancient Platonists felt this way.