Peter of Spain
Links
Excerpt from Peter of Spain
http://www.humnet.ucla.edu/humnet/phil/faculty/tparsons/phil107/p_spain.htm
A brief passage from the Treatise on Distributions, in Joseph Mullally's translation. Discusses the problem of whether the negation of a statement makes it universal or renders it indeterminate.
Excerpts from the Commentary on Peter of Spain's Tractatus
http://uwp.edu/~longeway/peterspa.htm
Selections from this secondary work by Simon of Faversham, translated by John Longeway.
Peter of Spain (Petrus Hispanus)
http://plato.stanford.edu/entries/peter-spain/
Life and work of 13th century logician and author of the Tractatus; from the Stanford Encyclopedia by Joke Spruyt.