Commensurability 3.1

In order to be consistent with Kuhn's use of the term 'incommensurable', then I should state that level 3 discussions are unresolvable in principle. Without a commonality of shared assumptions (level 1), any non-coercive agreement is impossible in principle (level 2). Note that this is a much stronger claim than that the justification for calling a debate level 3 is that no non-coercive agreement is likely. If the debate is properly at level 3, then insufficient commonaly of assumptions exists for the debate to be resolved one way or the other in principle. This will involve a strengthening of my characterisations of the different levels of incommensurability in my account. This is a minor revision, so the new version number of the account will be 3.1.

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