Yes you attacked my view on WPANI  However one does not establish credibility by what looks credible one offers arguments and supporting evidence as to why its credible  You agree its a professors vacation blog  Blogs are not considered credible sources on Wikipedia  See WPVerifiable Anyone can create a website or pay to have a book published then claim to be an expert in a certain field For that reason selfpublished books newsletters personal websites open wikis blogs forum postings and similar sources are largely not acceptable