The present paper revisits conventionalism about the geometry of classical and relativistic spacetimes. By means of critically examining a recent evaluation of conventionalism, we clarify key themes of, and rectify common misunderstandings about, conventionalism. Reichenbach's variant is demarcated from conventionalism simpliciter, associated primarily with Poincaré. We carefully outline the latter's core tenets-as a selective anti-realist response to a particular form of theory underdetermination. A subsequent double defence of geometric conventionalism is proffered: one line of defence employs (and thereby, to some extent, rehabilitates) a plausible reading of Reichenbach's idea of universal forces; another consists in independent support for conventionalism, unrelated to Reichenbach. Conventionalism, we maintain, remains a live option in contemporary philosophy of spacetime physics, worthy of serious consideration.

中文翻译：

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关于几何约定论，为什么赖兴巴赫并非完全错误，而庞加莱几乎是正确的。

本文重新审视了关于经典时空和相对论时空几何的约定论。通过批判性地审视最近对约定主义的评价，我们澄清了约定主义的关键主题，并纠正了对约定主义的常见误解。Reichenbach 的变体与 conventionalism simpliciter 划清界限，主要与 Poincaré 相关。我们仔细概述了后者的核心原则——作为对特定形式的理论不确定性的选择性反现实主义回应。随后提出了对几何约定论的双重辩护：一种辩护采用（并因此在某种程度上恢复了）对 Reichenbach 的普遍力思想的合理解读；另一个是独立支持约定主义，与赖兴巴赫无关。我们认为，约定俗成，