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Full Idea
There are two ways to read to read '2 + 2 = 4', as singular ('two and two is four'), and as plural ('two and two are four').
Gist of Idea
'2 + 2 = 4' can be read as either singular or plural
Source
Thomas Hofweber (Number Determiners, Numbers, Arithmetic [2005], §4.1)
Book Ref
-: 'Philosophical Review 114' [Phil Review 2005], p.194
A Reaction
Hofweber doesn't notice that this phenomenon occurs elsewhere in English. 'The team is playing well', or 'the team are splitting up'; it simply depends whether you are holding the group in though as an entity, or as individuals. Important for numbers.
9998 | What is the relation of number words as singular-terms, adjectives/determiners, and symbols? [Hofweber] |
10000 | We might eliminate adjectival numbers by analysing them into blocks of quantifiers [Hofweber] |
10001 | An adjective contributes semantically to a noun phrase [Hofweber] |
10002 | '2 + 2 = 4' can be read as either singular or plural [Hofweber] |
10003 | Why is arithmetic hard to learn, but then becomes easy? [Hofweber] |
10004 | Our minds are at their best when reasoning about objects [Hofweber] |
10005 | Arithmetic doesn’t simply depend on objects, since it is true of fictional objects [Hofweber] |
10006 | First-order logic captures the inferential relations of numbers, but not the semantics [Hofweber] |
10008 | Arithmetic is not about a domain of entities, as the quantifiers are purely inferential [Hofweber] |
10007 | Quantifiers for domains and for inference come apart if there are no entities [Hofweber] |