“ I know what I know In logic, "I know" is a statement however "I know what I know" is not. Although we believe that we exist, we cannot verify that... (read full comment) ” 

Posted on May 18, 2009 at 12:12 PM EDT

“ Your questions are sensible, but the photosynthesis focused research produces energy without any noticeable costs (if I understood the article... (read full comment) ” 

Posted on August 1, 2008 at 4:50 AM EDT