It has frequently been argued recently that Jeffrey Conditionalization (JC) does not permit undermining. For JC to be inapplicable in cases where the evidence could be undermined would severely compromise JC’s range. However, this paper contends that the argument fails to show that JC cannot accommodate undermining. This response turns on using the proper partition to capture the direct impact of our evidence in redistributing our credences.

中文翻译：

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杰弗里条件化允许破坏

最近经常有人争论杰弗里条件化（JC）不允许破坏。如果 JC 不适用于证据可能被破坏的情况，将严重损害 JC 的范围。然而，本文认为该论证未能表明 JC 不能容纳破坏。这种响应取决于使用适当的分区来捕获我们的证据对重新分配我们的信任的直接影响。