Combining Texts

Ideas for 'Lectures on Ethics', 'An Inquiry into Meaning and Truth' and 'On Mental Entities'

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8 ideas

5. Theory of Logic / A. Overview of Logic / 4. Pure Logic

16486

The physical world doesn't need logic, but the mental world does [Russell]

5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

2947	Questions wouldn't lead anywhere without the law of excluded middle [Russell]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / e. or

16480

A disjunction expresses indecision [Russell]

16479

'Or' expresses hesitation, in a dog at a crossroads, or birds risking grabbing crumbs [Russell]

16481

'Or' expresses a mental state, not something about the world [Russell]

16487

Maybe the 'or' used to describe mental states is not the 'or' of logic [Russell]

16483

Disjunction may also arise in practice if there is imperfect memory. [Russell]

5. Theory of Logic / L. Paradox / 6. Paradoxes in Language / c. Grelling's paradox

16475

A 'heterological' predicate can't be predicated of itself; so is 'heterological' heterological? Yes=no! [Russell]