geekthoughts Geek Thoughts: Penrose By : mdubinko October 18, 2008 0 The Penrose is mightier than the thorn. More collected Geek Thoughts at http://geekthoughts.info. geek thoughts Post navigation Previous Previous post:Next Next post: Related Posts Overcoming Anxiety March 16, 2017 The Vector Sum theory of leadership October 12, 2015