instances of present day orthodoxies tenaciously defending beliefs in the face of what would appear to be verified fact

Science is all about overturning received knowledge. If a theory is accepted by the main body of science you best know what you're talking about if you're thinking of overturning it. For someone to be so knowlegeable as to challenge the establishment in so many fields as your Mr. Hogan appears to claim to be, he must be far beyond polymath.