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Does that advice have a supporting analysis? It may seem counterintuitive to many.
I don't know of any empirical analyses, but I hang out with PR & marketing people, and they usually advise silence/'no comment' in the face of accusations. The human impulse to apologize gets many in deeper trouble, given modern media, allegedly.
You sure some of those PR friends aren’t lawyers 
Overheard in pub: “If Max Clifford is so good at PR, why does everyone think he’s a c#@t?” 
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