Combining Philosophers
Ideas for Chrysippus, Epicurus and Dag Prawitz
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 / 1. Overview of Logic
|
13831
|
Logic is based on transitions between sentences [Prawitz]
|
5. Theory of Logic / B. Logical Consequence / 1. Logical Consequence
|
13827
|
Logical consequence isn't a black box (Tarski's approach); we should explain how arguments work [Prawitz]
|
5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens
|
8078
|
Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin]
|
5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
|
21668
|
Epicurus rejected excluded middle, because accepting it for events is fatalistic [Epicurus, by Cicero]
|
|
6023
|
Every proposition is either true or false [Chrysippus, by Cicero]
|
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives
|
13825
|
Natural deduction introduction rules may represent 'definitions' of logical connectives [Prawitz]
|
5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / e. or
|
21676
|
Epicureans say disjunctions can be true whiile the disjuncts are not true [Epicurus, by Cicero]
|
5. Theory of Logic / H. Proof Systems / 4. Natural Deduction
|
13823
|
In natural deduction, inferences are atomic steps involving just one logical constant [Prawitz]
|
5. Theory of Logic / J. Model Theory in Logic / 1. Logical Models
|
13826
|
Model theory looks at valid sentences and consequence, but not how we know these things [Prawitz]
|