Ideas from 'An Inquiry into Meaning and Truth' by Bertrand Russell [1940], by Theme Structure
[found in 'An Inquiry into Meaning and Truth' by Russell,Bertrand [Penguin 1967,-]].
green numbers give full details |
back to texts
|
expand these ideas
3. Truth / A. Truth Problems / 7. Falsehood
|
16477
|
Asserting not-p is saying p is false
|
4. Formal Logic / C. Predicate Calculus PC / 2. Tools of Predicate Calculus / e. Existential quantifier ∃
|
16484
|
There are four experiences that lead us to talk of 'some' things
|
5. Theory of Logic / A. Overview of Logic / 4. Pure Logic
|
16486
|
The physical world doesn't need logic, but the mental world does
|
5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
|
2947
|
Questions wouldn't lead anywhere without the law of excluded middle
|
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / e. or
|
16479
|
'Or' expresses hesitation, in a dog at a crossroads, or birds risking grabbing crumbs
|
|
16480
|
A disjunction expresses indecision
|
|
16483
|
Disjunction may also arise in practice if there is imperfect memory.
|
|
16481
|
'Or' expresses a mental state, not something about the world
|
|
16487
|
Maybe the 'or' used to describe mental states is not the 'or' of logic
|
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!
|
11. Knowledge Aims / A. Knowledge / 1. Knowledge
|
16482
|
All our knowledge (if verbal) is general, because all sentences contain general words
|
11. Knowledge Aims / C. Knowing Reality / 1. Perceptual Realism / a. Naïve realism
|
4758
|
Naïve realism leads to physics, but physics then shows that naïve realism is false
|
12. Knowledge Sources / D. Empiricism / 1. Empiricism
|
16476
|
For simple words, a single experience can show that they are true
|
12. Knowledge Sources / D. Empiricism / 5. Empiricism Critique
|
16485
|
Perception can't prove universal generalisations, so abandon them, or abandon empiricism?
|
20. Action / C. Motives for Action / 3. Acting on Reason / b. Intellectualism
|
16478
|
A mother cat is paralysed if equidistant between two needy kittens
|