I finally received an email reply from Nassim Nicholas Taleb. He wrote, "you are off the hook" I checked, and the innaccurate (and insulting) material that he had on his website about me has been removed. I thank him for reconsidering the matter and correcting the situation. While I have been critical of him on several counts, I am largely in agreement with his analysis of the current situation and the broader problem of "black swans," or to use the more conventional terminology of Keynes and Knight, fundamental uncertainty. I also repeat that his books contain much interesting information and are fun to read.
Regarding barbell investment strategies, there is no single one that necessarily will do well all the time, and Taleb has stated that. He has indeed more fundamentally made the point that we all must keep this profound degree of uncertainty in mind. I also remind that there are many different forms that barbell strategies can take, and that one might be doing well even as others might not be doing well. In any case, I welcome an end to this feud that probably should never have occurred in the first place.