Here is the PDF in question:
Note that he writes:
Joshua said that an apology should be as public as the offense. I do not disagree, but
how can one go back and make an apology that is going to get thousands of YouTube
views since (a) I did not post that video myself and (b) I do not Twitter post so I have no
followers. Hopefully this will suffice since it is now an open posting.
In my view, this is in combination with the ENV piece is a very public apology. It cannot get much more public than this. As far as I am concerned, the issue of Tour calling Szostack a “liar” is a done issue.
The scientific details of this will be picked up here: James Tour details his reasoning.