About: http://webisa.webdatacommons.org/394202965

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	In his 1991 book Unnatural Doubts, Michael Williams focused on modern Cartesian scepticism (i.e. named after Ren?? Descartes), which proposes that ???there is no such thing as knowledge of the external world??? (1991: xii).
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com