Do impossible worlds exist?
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 the impossible in the world?
An impossible world, w, is the same sort of thing as a possible world (whatever that may be), except that it is in some sense “impossible.” Depending on the context, this may mean that some contradictions are true at w, that the normal laws of logic or of metaphysics fail to hold at w, or both.
What does it mean to be true in a possible world?
A possible world is a complete and consistent way the world is or could have been.
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.
Are there possible worlds?
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.
What is metaphysically possible?
Metaphysical possibility is one way of thinking about the possibility of something being the case, a way that is often of special relevance to philosophers. If you think about it, we often use the phrase ‘x is possible’ in a variety of ways.
Is everything logically possible?
Everything that is physically possible is logically possible, but the converse isn’t true. There is no magic in any physically possible world, because the existence of magic would violate the law of conservation of energy.
What is causally impossible?
if it violates a law of non contradiction (something cannot both be and not be at the same time), causal impossibility (i.e. if it violates a law of nature). Example: Levitating is logically possible, but causally impossible.
What does Epistemically possible mean?
An epistemic possibility is something that may be true, given the relevant epistemic constraints (for example, “Given what we know about the weather, it might rain tomorrow”), while an epistemic necessity is something that must be true given the relevant epistemic constraints (for example, “I don’t see Julie’s car in …
What are the laws of logic?
There are three laws upon which all logic is based, and they’re attributed to Aristotle. These laws are the law of identity, law of non-contradiction, and law of the excluded middle. According to the law of identity, if a statement is true, then it must be true.
What is logic potential?
Logical possibility refers to a logical proposition that cannot be disproved, using the axioms and rules of a given system of logic. The logical possibility of a proposition will depend upon the system of logic being considered, rather than on the violation of any single rule.
Is metaphysical possibility the same as logical possibility?
A statement is considered as logically possible if there are no contradicting word/s in the statement while a metaphysically possible statement if it tells the correct composition of an object.
What is Modalism philosophy?
Modal reasoning is central to human cognition, since it is pervasive both in philosophy and in every-day contexts. It involves investigating and evaluating claims about what is possible, impossible, essential, necessary, and contingent.
What is modal logic used for?
A modal is an expression (like ‘necessarily’ or ‘possibly’) that is used to qualify the truth of a judgement. Modal logic is, strictly speaking, the study of the deductive behavior of the expressions ‘it is necessary that’ and ‘it is possible that’.
What does metaphysically necessary mean?
Summary. If something could not have been otherwise, no matter how the world had turned out, that thing is metaphysically necessary.
Is God a metaphysical necessity?
Necessity in theology
While many theologians (e.g. Anselm of Canterbury, René Descartes, and Gottfried Leibniz) considered God to be a logically or metaphysically necessary being, Richard Swinburne argued for factual necessity, and Alvin Plantinga argues that God is a causally necessary being.
Why do we need metaphysics?
Metaphysics adds a level of conceptual rigor and clarity that can only improve the steadfastness of our knowledge: it is not here to compete with or replace any other fields, it is here as a necessary supplement to them in our quest for truth about reality.