No philosopher is needed to say where reality may be found. The fool no less than the wise man is in direct touch with real existence at every moment of his waking or dreaming life. To find reality might be a problem for timeless gods beyond the flux of nature—if timeless gods can be said to have problems—but natural creatures encounter reality at every turn. Nor need we look to the philosopher for knowledge. A division of labor having been made between philosopher and scientist, it is to the scientist that we turn for most of our knowledge. Nevertheless, tasks for the philosopher remain and one of these is to make clear what knowledge is, for, to have knowledge is one thing; to know what knowledge is, is another. Science, we may safely assume, constitutes our best claim to knowledge but not all who know their science can say why it is knowledge.