Combining Texts
Ideas for
'On the Philosophy of Logic', 'Introduction to Mathematical Philosophy' and 'Reals by Abstraction'
expand these ideas
|
start again
|
choose
another area for these texts
display all the ideas for this combination of texts
6 ideas
10. Modality / B. Possibility / 1. Possibility
8941
|
We can't explain 'possibility' in terms of 'possible' worlds [Fisher]
|
10. Modality / B. Possibility / 8. Conditionals / c. Truth-function conditionals
12197
|
Inferring q from p only needs p to be true, and 'not-p or q' to be true [Russell]
|
14450
|
All forms of implication are expressible as truth-functions [Russell]
|
8947
|
If all truths are implied by a falsehood, then not-p might imply both q and not-q [Fisher]
|
10. Modality / B. Possibility / 8. Conditionals / d. Non-truthfunction conditionals
8949
|
In relevance logic, conditionals help information to flow from antecedent to consequent [Fisher]
|
10. Modality / E. Possible worlds / 1. Possible Worlds / a. Possible worlds
14460
|
If something is true in all possible worlds then it is logically necessary [Russell]
|