About: http://webisa.webdatacommons.org/90283813

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Two, that the principle of contradiction follows directly from our concept of negation, i.e. anyone who insists on the possibility that Socrates is white and Socrates is not white simply cannot have understood the meaning of 'not'.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com