MP: I think he was providing k'lalim for all listeners not really "into" diqduq -- this shiur was not the time to list exceptions to those k'lalim, even if he was aware of them» Precisely It appears as more of a "Rule of thumb" than an absolute.. I'm guessing he used like a "talmudic idiom" such as "ein bein" Shalom and Regards, RRW