The primary reason for Robinson's 1984 book was to discredit Mr. Armstrong. And any juicy rumour or whiff of slander he heard was immediately included in his diatribe against God's servant. Robinson is no different from Dennis, Douglas, Gavin, Stan, Corky, Richard , Charlie and the rest of the cabal, who left WCG screaming that HWA was a charlatan. They goal in life is to listen to or discover anything that would discredit God's servant.
Blindly, him who is pursuing, what is laughingly called, "A degree in theology" mindlessly wondered "What kind of proof would they like?" Ignoring the weakness of the question, they would like the same proof that you would want to see, if the same allegations were make against you or any of the cabal of irrational scoffers. You dumbo!