Re: cracks and pots and Mac Lane

Eduardo quotes Mac Lane as saying (paraphrased) If it hasn't been proved, it isn't mathematics Much as I admire Mac Lane and owe much to him, that's rather at odds with what most of us do even those who insist on getting a proof ultimately. case in point: http://www.oxfordtoday.ox.ac.uk/2005-06/v18n2/04.shtml if that isn't math, what is it? (perjorative adjective of your choice) mathematics? Was Newton doing *only* physics? jim