Ideas from 'The Nature of Necessity' by Alvin Plantinga [1974], by Theme Structure

[found in 'The Nature of Necessity' by Plantinga,Alvin [OUP 1982,0-19-824414-2]].

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10. Modality / E. Possible worlds / 1. Possible Worlds / d. Possible worlds actualism
Plantinga says there is just this world, with possibilities expressed in propositions [Armstrong]
10. Modality / E. Possible worlds / 3. Transworld Objects / b. Rigid designation
Possibilities for an individual can only refer to that individual, in some possible world [Mackie,P]
28. God / B. Proving God / 2. Proofs of Reason / a. Ontological Proof
A possible world contains a being of maximal greatness - which is existence in all worlds [Davies,B]