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A possible world is a way the real world could have been. Modal logic, propositions, state of affairs and eternal entities are some of the considerations when discussing a possible world.


Possible Worlds

Part 1

I.  Introduction

A.  Modal Logic

1.  Traditional - Two-Value Logic

2.  Modality - Three-Value Logic

B.  Propositions

1.  Relationship to a sentence

2.  Relationship to truth

C.  State of Affairs

1.  Relationship to a proposition

2.  Converting a proposition to a state of affairs

D.  Eternal Entities

1.  Every true proposition is eternally true.

2.  States of affairs are eternal entities.