Cover Page
The handle http://hdl.handle.net/1887/18623 holds various files of this Leiden University dissertation.
Author: Helm, Alfred Charles van der
Title: A token of individuality : Questiones libri porphirii by Thomas Manlevelt Issue Date: 2012-03-22
2011013 [Van der Helm] –Cover. print [date 1202061242 : version 0] page 1
The Questiones Libri Porphirii is a commentary on Porphyry’s Isagoge by the fourteenth-century logician Thomas Manlevelt.
Not much is known about Thomas Manlevelt, but his work is remarkable enough. Following in the footsteps of William of Ockham, Manlevelt stresses the individual nature of all things existing in the outside world. He radically challenges our conceptions of the outside world. He applies Ockham’s Razor in an unscrupulous manner to do away with all entities not deemed neces- sary to preserve. In the end, Manlevelt even maintains that substance does not exist.
