Combining Texts

All the ideas for 'Theory of Science (4 vols)', 'A Note on the entscheidungsproblem' and 'Propositions'

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20 ideas

2. Reason / B. Laws of Thought / 1. Laws of Thought
7807 The laws of thought are true, but they are not the axioms of logic [Bolzano, by George/Van Evra]
3. Truth / A. Truth Problems / 5. Truth Bearers
13941 Are the truth-bearers sentences, utterances, ideas, beliefs, judgements, propositions or statements? [Cartwright,R]
13942 Logicians take sentences to be truth-bearers for rigour, rather than for philosophical reasons [Cartwright,R]
5. Theory of Logic / K. Features of Logics / 7. Decidability
18758 Validity is provable, but invalidity isn't, because the model is infinite [Church, by McGee]
6. Mathematics / A. Nature of Mathematics / 2. Geometry
9618 Bolzano wanted to reduce all of geometry to arithmetic [Bolzano, by Brown,JR]
6. Mathematics / C. Sources of Mathematics / 2. Intuition of Mathematics
9830 Bolzano began the elimination of intuition, by proving something which seemed obvious [Bolzano, by Dummett]
7. Existence / C. Structure of Existence / 1. Grounding / c. Grounding and explanation
17265 Philosophical proofs in mathematics establish truths, and also show their grounds [Bolzano, by Correia/Schnieder]
9. Objects / F. Identity among Objects / 4. Type Identity
13945 A token isn't a unique occurrence, as the case of a word or a number shows [Cartwright,R]
12. Knowledge Sources / E. Direct Knowledge / 2. Intuition
9185 Bolzano wanted to avoid Kantian intuitions, and prove everything that could be proved [Bolzano, by Dummett]
19. Language / A. Nature of Meaning / 1. Meaning
13948 For any statement, there is no one meaning which any sentence asserting it must have [Cartwright,R]
13950 People don't assert the meaning of the words they utter [Cartwright,R]
19. Language / D. Propositions / 1. Propositions
22276 Bolzano saw propositions as objective entities, existing independently of us [Bolzano, by Potter]
13944 We can pull apart assertion from utterance, and the action, the event and the subject-matter for each [Cartwright,R]
13947 'It's raining' makes a different assertion on different occasions, but its meaning remains the same [Cartwright,R]
19. Language / D. Propositions / 2. Abstract Propositions / a. Propositions as sense
17264 Propositions are abstract structures of concepts, ready for judgement or assertion [Bolzano, by Correia/Schnieder]
12232 A 'proposition' is the sense of a linguistic expression, and can be true or false [Bolzano]
19. Language / D. Propositions / 4. Mental Propositions
13943 We can attribute 'true' and 'false' to whatever it was that was said [Cartwright,R]
13946 To assert that p, it is neither necessary nor sufficient to utter some particular words [Cartwright,R]
19. Language / E. Analyticity / 2. Analytic Truths
12233 The ground of a pure conceptual truth is only in other conceptual truths [Bolzano]
19. Language / F. Communication / 2. Assertion
13951 Assertions, unlike sentence meanings, can be accurate, probable, exaggerated, false.... [Cartwright,R]