Ideas from 'Ontology' by Dale Jacquette [2002], by Theme Structure

[found in 'Ontology' by Jacquette,Dale [Acumen 2002,1-902683-56-0]].

Click on the Idea Number for the full details    |     back to texts     |     expand these ideas

4. Formal Logic / D. Modal Logic ML / 4. Alethic Modal Logic
The modal logic of C.I.Lewis was only interpreted by Kripke and Hintikka in the 1960s
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
Logic describes inferences between sentences expressing possible properties of objects
5. Theory of Logic / C. Ontology of Logic / 2. Platonism in Logic
Logic is not just about signs, because it relates to states of affairs, objects, properties and truth-values
5. Theory of Logic / F. Referring in Logic / 2. Descriptions / c. Theory of definite descriptions
On Russell's analysis, the sentence "The winged horse has wings" comes out as false
5. Theory of Logic / L. Paradox / 5. Paradoxes in Set Theory / d. Russell's paradox
Can a Barber shave all and only those persons who do not shave themselves?
7. Existence / A. Nature of Existence / 1. Nature of Existence
Ontology is the same as the conceptual foundations of logic
7. Existence / A. Nature of Existence / 3. Being / a. Nature of Being
To grasp being, we must say why something exists, and why there is one world
7. Existence / A. Nature of Existence / 7. Reason for Existence
Existence is completeness and consistency
Being is maximal consistency
7. Existence / D. Theories of Reality / 10. Ontological Commitment / a. Ontological commitment
Ontology must include the minimum requirements for our semantics
7. Existence / E. Categories / 3. Proposed Categories
Logic is based either on separate objects and properties, or objects as combinations of properties
Reduce states-of-affairs to object-property combinations, and possible worlds to states-of-affairs
8. Modes of Existence / B. Properties / 11. Properties as Sets
If classes can't be eliminated, and they are property combinations, then properties (universals) can't be either
9. Objects / A. Existence of Objects / 1. Physical Objects
An object is a predication subject, distinguished by a distinctive combination of properties
9. Objects / A. Existence of Objects / 2. Abstract Objects / c. Modern abstracta
Numbers, sets and propositions are abstract particulars; properties, qualities and relations are universals
10. Modality / E. Possible worlds / 1. Possible Worlds / a. Possible worlds
The actual world is a consistent combination of states, made of consistent property combinations
10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / a. Nature of possible worlds
The actual world is a maximally consistent combination of actual states of affairs
10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / c. Worlds as propositions
Do proposition-structures not associated with the actual world deserve to be called worlds?
We must experience the 'actual' world, which is defined by maximally consistent propositions
15. Nature of Minds / B. Properties of Minds / 5. Qualia / b. Qualia and intentionality
The Twin Earth theory suggests that intentionality is independent of qualia
15. Nature of Minds / B. Properties of Minds / 5. Qualia / c. Explaining qualia
If qualia supervene on intentional states, then intentional states are explanatorily fundamental
17. Mind and Body / E. Physicalism / 2. Reduction of Mind
Reduction of intentionality involving nonexistent objects is impossible, as reduction must be to what is actual
19. Language / E. Propositions / 2. Nature of Propositions
The extreme views on propositions are Frege's Platonism and Quine's extreme nominalism