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Short version of Jim's letter: If you can't fault the message, fault the messenger.
Jim, I have no idea what you do or how carefully you follow the news. I don't know if you have been a regular reader of Krugman or if you've come to read him -- hopefully you do actually read him for yourself rather than depend on others characterizations -- only recently as someone who (at least apparently) is an Obama partisan. Whatever the case, while it is certainly true that Krugman does make mistakes just as does any other human being, his overall track record is nothing short of amazing and attacking him for something he may or may not have said and with absolutely no context for what is being claimed is simple fallacy. It's called argumentum ad hominem.
If there is some basis for taking issue with the specifics of what Krugman has to say, then let's hear it. But argumentum ad hominem is not gonna cut it with anyone capable of rational thought. In other words, some substance, please.