Combining Texts

All the ideas for 'Lectures on Ethics', 'Psychology from an empirical standpoint' and 'An Introduction to Modal Logic'

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7 ideas

4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / b. Terminology of PL
9540 A 'value-assignment' (V) is when to each variable in the set V assigns either the value 1 or the value 0 [Hughes/Cresswell]
4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / d. Basic theorems of PL
9541 The Law of Transposition says (P→Q) → (¬Q→¬P) [Hughes/Cresswell]
4. Formal Logic / B. Propositional Logic PL / 4. Soundness of PL
9543 The rules preserve validity from the axioms, so no thesis negates any other thesis [Hughes/Cresswell]
5. Theory of Logic / K. Features of Logics / 4. Completeness
9544 A system is 'weakly' complete if all wffs are derivable, and 'strongly' if theses are maximised [Hughes/Cresswell]
15. Nature of Minds / B. Features of Minds / 4. Intentionality / a. Nature of intentionality
3364 All mental phenomena contain an object [Brentano]
15. Nature of Minds / B. Features of Minds / 5. Qualia / b. Qualia and intentionality
3225 Mental unity suggests that qualia and intentionality must connect [Brentano, by Rey]
25. Social Practice / F. Life Issues / 4. Suicide
19739 The maxim for suicide is committed to the value of life, and is thus contradictory [Kant]