Recent philosophical discussions about metaphysical indeterminacy have been substantiated with the idea that quantum mechanics, one of the most successful physical theories in the history of science, provides explicit instances of worldly indefiniteness. Against this background, several philosophers underline that there are alternative formulations of quantum theory in which such indeterminacy has no room and plays no role. A typical example is Bohmian mechanics in virtue of its clear particle ontology. Contrary to these latter claims, this paper aims at showing that different pilot-wave theories do in fact instantiate diverse forms of metaphysical indeterminacy. Namely, I argue that there are various questions about worldly states of affairs that cannot be determined by looking exclusively at their ontologies and dynamical laws. Moreover, it will be claimed that Bohmian mechanics generates a new form of modal indeterminacy. Finally, it will be concluded that ontological clarity and indeterminacy are not mutually exclusive, i.e., the two can coexist in the same theory.

最近关于形而上学不确定性的哲学讨论已被这样的观点所证实：量子力学是科学史上最成功的物理理论之一，它提供了世俗不确定性的明确实例。在此背景下，一些哲学家强调，量子理论存在其他替代表述，其中这种不确定性没有空间，也不起作用。一个典型的例子是波姆力学，它具有清晰的粒子本体论。与后面的主张相反，本文旨在表明不同的导波理论实际上确实实例化了不同形式的形而上学不确定性。也就是说，我认为，关于世俗事态的各种问题不能仅通过关注其本体论和动力法则来确定。此外，据称波姆力学产生了一种新形式的模态不确定性。最后得出结论，本体论的明确性和不确定性并不是相互排斥的，即两者可以共存于同一理论中。