 He believes further that two smooth plates could not be separated (again, because nature abhors a vacuum) unless there were some air still between them, which with enough force may become rarefied, allowing the plates to be separated.Hennon is less original on a plurality of worlds, where he borrows text verbatim from Albert of Saxony's "Quaestiones in libros de Caelo et Mundo".He follows Albert and John Buridan in asserting that a multiplicity of worlds is not contradictory and therefore possible through divine omnipotence.