Combining Philosophers
Ideas for Hermarchus, Charles Sanders Peirce and Douglas Lackey
expand these ideas
|
start again
|
choose
another area for these philosophers
display all the ideas for this combination of philosophers
9 ideas
5. Theory of Logic / A. Overview of Logic / 3. Value of Logic
14780
|
Only study logic if you think your own reasoning is deficient [Peirce]
|
5. Theory of Logic / B. Logical Consequence / 4. Semantic Consequence |=
19237
|
Deduction is true when the premises facts necessarily make the conclusion fact true [Peirce]
|
5. Theory of Logic / C. Ontology of Logic / 1. Ontology of Logic
19256
|
Our research always hopes that reality embodies the logic we are employing [Peirce]
|
5. Theory of Logic / C. Ontology of Logic / 3. If-Thenism
14783
|
Logic, unlike mathematics, is not hypothetical; it asserts categorical ends from hypothetical means [Peirce]
|
21493
|
Pure mathematics deals only with hypotheses, of which the reality does not matter [Peirce]
|
5. Theory of Logic / D. Assumptions for Logic / 1. Bivalence
19102
|
Bivalence is a regulative assumption of enquiry - not a law of logic [Peirce, by Misak]
|
5. Theory of Logic / E. Structures of Logic / 6. Relations in Logic
19238
|
The logic of relatives relies on objects built of any relations (rather than on classes) [Peirce]
|
5. Theory of Logic / L. Paradox / 5. Paradoxes in Set Theory / b. Cantor's paradox
21554
|
Sets always exceed terms, so all the sets must exceed all the sets [Lackey]
|
5. Theory of Logic / L. Paradox / 5. Paradoxes in Set Theory / c. Burali-Forti's paradox
21553
|
It seems that the ordinal number of all the ordinals must be bigger than itself [Lackey]
|