Duplex Cognitio: What I Need to Know and How the Liberal Arts Can Help Me Know It http://www.phc.edu/news/docs/0510041Media.asp http://class.phc.edu/AngelUploads/Content/dlgroupf05/_assoc/1FB001CACABF4B0CBA4D294E1EEC6977/DuplexCognitio-PHCfacultyLecture-PrintVe.pdf