Page 157 - MODES of EXPLANATION

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case reversals over
A
, if it is as good as the second (in the sense just defined) and the second is
not as good as it (in that sense). Then the ascending reversal sequences of the Ockham method
are all duplicated by the violator (due to nature’s winning strategy to force all convergent
methods to produce all such sequences), but the violator’s reversal sequence (3, 1) is never
matched by the Ockham method.
v
This is just a simplified, informal gloss, and there remains a great deal to be said. For example,
the order is a pre-order in general, but is a partial order if the theories are locally closed (in the
topological sense) with respect to the topology induced by possible information states. When
answers are not locally closed, we recommend shifting the question until they are. That is the
beginning of a normative theory of how to pose scientific questions.
vi
This discussion of the Copernican revolution follows Kuhn (1957).
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