What is a possible world in philosophy?
Definition. A possible world is a complete way things might be. Possible worlds are alternative worlds one of which is the actual world. Philosophers use the notion of a possible world to define and discuss ideas such as possibility or necessity.
Do possible worlds exist?
Possible worlds exist – they are just as real as our world; Possible worlds are the same sort of things as our world – they differ in content, not in kind; Possible worlds cannot be reduced to something more basic – they are irreducible entities in their own right. Actuality is indexical.
Is there a best possible world?
And since there are infinitely many possible worlds, it might seem that, just as there is no greatest among the infinitely many numbers, there is no best of the possible worlds. Leibniz rejects these possibilities by appealing to the Principle of Sufficient Reason (PSR), a central principle of his philosophical system.
Why do we need possible worlds?
A possible world is a complete and consistent way the world is or could have been. Possible worlds are widely used as a formal device in logic, philosophy, and linguistics in order to provide a semantics for intensional and modal logic.
Are there impossible worlds?
The worlds we are interested in are not in there. These worlds are often called logically impossible worlds, as logical laws such as the Law of Non-Contradiction or the Law of Excluded Middle are assumed to be the most general and topic-neutral: they are supposed to hold at all possible worlds.
What is logically impossible in philosophy?
Something is logically impossible if it is contradictory, or against the laws of logic. Thus a round square is a logical impossibility, and it is logically impossible to be a tall man without being tall. But it is not logically impossible to dissolve gold in water.
How do you know if something is logically possible?
Logical possibility is usually considered the broadest sort of possibility; a proposition is said to be logically possible if there is no logical contradiction involved in its being true.
What does possibility mean in philosophy?
In logic, possibility implies the absence of a contradiction. Such definitions as “The possible is that which either is or will be true” and “that which is not prevented by anything from happening even if it does not happen” were current in Hellenistic Greece.
What is the modal possible?
Modal verbs express if something is certain, probable or possible. If something is possible in the future, we use ‘could’, ‘might’ or ‘may’ before the main verb to talk about it. If something is possible now or was possible in the past we add the word ‘have’ after the modal verb. This still expresses possibility.