Matt Steinglass unpacks it:

[T]here’s a deeper kernel to the neocon mind, and that is an inability to cope with the ambiguity of information; or, to say the same thing, the ambiguity of reality; or, to say the same thing, the multiplicity of human subjectivity. The neocon mind is binary: Saddam either does or does not have WMD. If he has WMD, we must invade. The Iranian people either do or do not support their government. If they do not, then they will welcome American efforts to overthrow it. Neocons find it difficult to handle the discounting one must apply to large quantities of complex information drawn from different sources in order to come to a reasonable conclusion.

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