Abstract

In the literature on mereology it is often accepted that mereological universalism entails extensionalism. More precisely, many accept that, if parthood is assumed to be a partial order (and, thus, the relevant theory of parthood is taken to be at least as strong as ‘core mereology’), the thesis that every plurality of entities has a mereological fusion entails the thesis that different composite entities have different proper parts. Central to this idea is the principle known as ‘Weak Supplementation’ which many take to impose an important constraint on the relation of proper parthood. In this paper I argue that this claim is false as the principle that I will call ‘Minimal Supplementation’ appears to be capable of doing all the work done by Weak Supplementation but without entailing extensionalism if conjoined with universalism and core mereology.

中文翻译：

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普遍主义并不意味着外延主义

摘要

在关于分体学的文献中，分体学普遍主义通常被认为需要外延主义。更准确地说，许多人承认，如果假设部分是一种部分秩序（因​​此，相关的部分理论被认为至少与“核心分子论”一样强大），那么每个实体的复数都有一个分子融合需要不同的复合实体具有不同的适当部分的论点。这个想法的核心是被称为“弱补充”的原则，许多人认为它对适当的部分关系施加了重要的约束。