What can we know of the world?

          @misc{ scivideos_PIRSA:10050051,
            doi = {10.48660/10050051},
            url = {https://pirsa.org/10050051},
            author = {},
            keywords = {},
            language = {en},
            title = {What can we know of the world?},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2010},
            month = {may},
            note = {PIRSA:10050051 see, \url{https://scivideos.org/index.php/pirsa/10050051}}
          }