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Single Idea 10002

[filed under theme 6. Mathematics / A. Nature of Mathematics / 3. Nature of Numbers / a. Numbers ]

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.


The 10 ideas from 'Number Determiners, Numbers, Arithmetic'

What is the relation of number words as singular-terms, adjectives/determiners, and symbols? [Hofweber]
We might eliminate adjectival numbers by analysing them into blocks of quantifiers [Hofweber]
An adjective contributes semantically to a noun phrase [Hofweber]
'2 + 2 = 4' can be read as either singular or plural [Hofweber]
Why is arithmetic hard to learn, but then becomes easy? [Hofweber]
Our minds are at their best when reasoning about objects [Hofweber]
Arithmetic doesn’t simply depend on objects, since it is true of fictional objects [Hofweber]
First-order logic captures the inferential relations of numbers, but not the semantics [Hofweber]
Arithmetic is not about a domain of entities, as the quantifiers are purely inferential [Hofweber]
Quantifiers for domains and for inference come apart if there are no entities [Hofweber]