David Javerbaum in the NYT:
Before Mitt Romney, those seeking the presidency operated under the laws of so-called classical politics, laws still followed by traditional campaigners like Newt Gingrich. Under these Newtonian principles, a candidate’s position on an issue tends to stay at rest until an outside force — the Tea Party, say, or a six-figure credit line at Tiffany — compels him to alter his stance, at a speed commensurate with the size of the force (usually large) and in inverse proportion to the depth of his beliefs (invariably negligible). This alteration, framed as a positive by the candidate, then provokes an equal but opposite reaction among his rivals.
But the Romney candidacy represents literally a quantum leap forward. It is governed by rules that are bizarre and appear to go against everyday experience and common sense. To be honest, even people like Mr. Fehrnstrom who are experts in Mitt Romney’s reality, or “Romneality,” seem bewildered by its implications; and any person who tells you he or she truly “understands” Mitt Romney is either lying or a corporation.
Nevertheless, close and repeated study of his campaign in real-world situations has yielded a standard model that has proved eerily accurate in predicting Mitt Romney’s behavior in debate after debate, speech after speech, awkward look-at-me-I’m-a-regular-guy moment after awkward look-at-me-I’m-a-regular-guy moment, and every other event in his face-time continuum.
The basic concepts behind this model are:
Complementarity. In much the same way that light is both a particle and a wave, Mitt Romney is both a moderate and a conservative, depending on the situation (Fig. 1). It is not that he is one or the other; it is not that he is one and then the other. He is both at the same time.
Probability. Mitt Romney’s political viewpoints can be expressed only in terms of likelihood, not certainty. While some views are obviously far less likely than others, no view can be thought of as absolutely impossible. Thus, for instance, there is at any given moment a nonzero chance that Mitt Romney supports child slavery.