Nonreductive physicalists endorse the principle of mental causation, according to which some events have mental causes. Nonreductive physicalists also endorse the principle of physical causal completeness, according to which physical events have sufficient physical causes. Critics typically level the causal exclusion problem against this nonreductive physicalist model, according to which the physical cause is a sufficient cause of the behavioural effect, so the mental cause is excluded from causally influencing the behaviour. Numerous nonreductive physicalists have responded to the causal exclusion problem by weakening the principle of physical causal completeness in various ways. The result: either various nonreductive physicalist solutions fail on account of the fact that they do not satisfy a robustly defined principle of physical causal completeness, or there is an accelerating trend of solving the causal exclusion problem by suitably weakening the principle of physical causal completeness.

中文翻译：

---

因果排除和物理因果完整性

非还原物理学家赞同心理因果原理，根据该原理，某些事件具有心理原因。非还原物理学家也赞同物理因果完备性原则，根据该原则，物理事件有足够的物理原因。批评者通常将因果排除问题与这种非还原物理主义模型相提并论，根据该模型，物理原因是行为影响的充分原因，因此精神原因被排除在对行为的因果影响之外。许多非还原物理学家通过各种方式削弱物理因果完备性原则来应对因果排斥问题。结果：