You obviously don't know what you're talking about.
You have conceded the debate by failing to find any quote from anything, written by Heinlein or anyone else, that contradicts my fairly extensive quote from Heinlein, not to mention my earlier quotes from his obituary, and from material whose source was Heinlein's wife.
I here and now decree a law, that shall stand alongside Godwin's law for all time, and that shall, in honor of my pseudonym, be named "Israel's Law":
In any Internet debate, the probability approaches 1 that the at least one party will abandon any semblence of argument, and reply, effectively, "yo mamma." When that happens, the debate is over, and the first one to call "yo mamma" is the loser.
Corollary: Any statement which admits no logical reply is deemed equivalent to "yo mamma." Examples include: you're stupid; you don't know what you're talking about; go back to kindergarten; ROTFL; etc.
Corollary: If one party calls "yo mamma" but does continue to offer rational arguments, then Israel's Law is not yet satisfied.