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Single Idea 23477

[filed under theme 5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives ]

Full Idea

Such words as or, not, all, some, plainly involve logical notions; since we use these intelligently, we must be acquainted with the logical objects involved. But their isolation is difficult, and I do not know what the logical objects really are.

Gist of Idea

We use logical notions, so they must be objects - but I don't know what they really are

Source

Bertrand Russell (The Theory of Knowledge [1913], 1.IX)

Book Ref

Russell,Bertrand: 'The Theory of Knowledge', ed/tr. Eames,ER /Blackwell,K [Routledge 1992], p.99

A Reaction

See Idea 23476, from the previous page. Russell is struggling. Wittgenstein was telling him that the constants are rules (shown in truth tables), rather than objects.

Related Idea

Idea 23476 Logical constants seem to be entities in propositions, but are actually pure form [Russell]

The 4 ideas from 'The Theory of Knowledge'

22315 There can't be a negative of a complex, which is negated by its non-existence [Potter on Russell]
23476 Logical constants seem to be entities in propositions, but are actually pure form [Russell]
23477 We use logical notions, so they must be objects - but I don't know what they really are [Russell]
18273 Logical truths are known by their extreme generality [Russell]