In natural language, number-words can be used in two different syntactic ways: adjectivally, i.e., with the syntactic status of an adjective, as in (1) ‘Mars has two moons,’ and nominally, i.e., with the syntactic status of a noun phrase, as in (2) ‘Two is even.’ This syntactic difference is often taken to correspond to a difference in semantic function: adjectival number-words function as predicables, whereas nominal number-words function as singular terms. The view that nominal number-words function as singular terms is typically supported by appeal to certain tests for singular-termhood, tests that stem from the (neo-)Fregean tradition. In this paper, I argue that these tests do not support the view of nominal number-words as singular terms.

中文翻译：

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数字的单​​数术语？

在自然语言中，数字词可以以两种不同的句法方式使用：形容词，即具有形容词的句法状态，如（1）中的“火星有两个卫星”，名义上也具有形容词的句法状态。一个名词短语，如（2）中的“两个是偶数”。这种句法上的差异通常被认为与语义功能上的差异相对应：形容词-单词词充当可谓词，而名义词-单词充当单数词。通常认为，名词性数字词充当单数词的观点受到某些单数词性测试（这种测试源自（新）法国传统）的支持。在本文中，我认为这些测试不支持将名义数字单词视为单数形式。