To which his fellow panelist Fred Barnes replied, "Not only perfidious, but untrustworthy, too".
It's also not about perfidious Muslims who destroyed innumerable Hindu temples and forcibly converted millions of Indians to Islam.
True, the actual words "perfidy" and "perfidious" aren't used that much anymore.
He continued: "I have been unable to conclude otherwise than that, when they were not totally useless, perfidious, and parasitic, they were unspeakably barbaric".
"The current charade of international control over Bashar's chemical arsenal would be funny if it were not so blatantly perfidious, and designed not only to give Mr. Obama an opportunity to back down but also to help Assad to butcher his people," said Prince Turki, a member of the Saudi royal family and a former director of Saudi intelligence.
Turki al-Faisal, the former director of Saudi intelligence and a member of the royal family, said, in 2013, that Obama's failure to follow through on his "red line" warning "would be funny if it were not so blatantly perfidious".
That Lord Strathclyde had been just as perfidious did not prevent his preferment.
"The CIA has further represented that this sort of operation would not be undertaken in a perfidious or treacherous manner," the white paper says.
At the very least, he might be reflecting, perfidious Albion could not be relied upon to rally to the rescue.
The film purports to be a history of the Byzantine Empire's fall at the hands of the perfidious West, and not, as scholars have it, to the Ottoman Turks, who conquered Constantinople in 1453.
