Response to John Robbins

UPDATE June 13, 2011: After the original article in VegNews appeared, John Robbins wrote a response which was posted on the VegSource web site.  I wrote a rebuttal which I posted here.

However, John Robbins' letter has now disappeared from the VegSource web site (the link is dead) and cannot be found anywhere on a live web site.  Apparently, in fact, the link has been dead for many years.  Accordingly, I see no point in continuing to post a reply.  

Anyone who is truly and sincerely interested in digging up his letter and my response can probably do so by accessing internet archives, but it won't enhance your understanding of the story.