Inevitably, my rav is unafraid to admit what he doesn't know, but he will pose the question, anyway. I heard this from him during last week's Seudah Shlishit, after the herring:
There are two sins that B'nai Yisra'el did where G-d proposes to destroy all the people and make Moshe into a great nation - The Golden Calf and the Spy Mission. In both occasions, Moshe turns down the offer and appeals to G-d in similar fashion in both. His initial argument in both is "What will Egypt (or the other nations) think?"
However, in the case of the Golden Calf, he invokes the merit of Avraham, Yitzhak and Ya'akov as part of his appeal. We do not see the forefathers' merit used in the Spy incident?
Why did Moshe not make any mention of this in the spy incident?