EPISTEMOLOGIA

VIDEO 1: http://www.youtube.com/watch?v=lpmf5AIbP_E
VIDEO 2: http://www.youtube.com/watch?v=B03fPV3NptA&NR=1
VIDEO 3: http://www.youtube.com/watch?v=Iyb-6vcNqyk&NR=1
VIDEO 4: http://www.youtube.com/watch?v=7c-DWlaq0XI&feature=related
VIDEO 5: http://www.youtube.com/watch?v=0Z3x4vplyLo&NR=1