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Questions tagged [truth]

Theories of truth deal with questions such as: what are truths? what makes them true? what is the relation between truths and the things that makes them true? Not to be confused with "what is the truth", which is a completely different matter.

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How can we reason about “if P then Q” or “P only if Q” statements in propositional logic?

When you have a propositional sentence of the form P ⊃ Q  — which we might read as "if P, then Q" — how can you tell when it is true, or false, based on the truth-values of P and ...
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What is the difference between Fact and Truth?

I'm curious about the difference between Fact and Truth. I was searching on the internet if I could find it. But still I'm confused about the exact meaning. I first read the forum discussion here Fact ...
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Is everything just an opinion?

I read some people don't believe in truth but do believe there is always a chance that x. I have a question about such thought. I recently heard an anecdote that says nobody can ever prove I ate ...
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Is there modal logic without possible worlds?

Would it be desirable to carry out a deflationary research programme in modal logic? In other words, would it be desirable to re-think modal logic without the possible worlds semantics? The original ...
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Motivations for dialetheism?

At the request of the moderators, I've reformulated this question to change the emphasis of the question to something perhaps a little more broad-ranging: Question. What are the major modern ...
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Can my attitude kill you?

Would it be morally reprehensible to tell a truth to someone if I know or suspect that it may cause them harm or discomfort? Of course there are trivial instances like telling a dying man he is going ...
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What are the philosophical implications of Gödel's First Incompleteness Theorem?

Gödel's First Incompleteness Theorem states Any effectively generated theory capable of expressing elementary arithmetic cannot be both consistent and complete. In particular, for any ...
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How do quantifiers work in predicate logic?

Predicate logic is somewhat like propositional logic, except that where propositional logic only works on the level of whole sentences (e.g. A = "Socrates is mortal", B = "All ...
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Is scientism a self defeating epistemology?

Some who have argued against the validity of scientism have argued that the view that only science can uncover truth is not a scientific discovery but rather a epistemology. Hence it has been claimed ...
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What makes Humans different from a chemical computer?

Are we all robots? Is our DNA the 0's and 1's of computer code? Are we an advanced computer system, with instead of keyboard and mouse input... input from our senses. Our database being our brain ...
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Finding a clear difference between truth and fact [duplicate]

I have been starting back in school after a long hiatus. In one of my classes, a discussion of Truth began. The problem I have had is that no one seems to have a solid definition between the two. ...
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Can there be true conclusions without assumptions?

I was thinking of the sentence "I think therefore I am", which I had for a long time considered indisputable because it's self-evident. Then I considered the hypothetical situation where my ...
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Shouldn't statements be considered equivalent based on their meaning rather than truth tables?

Consider the following truth table, which serves to define the logical connective ⇔, P | Q || P⇔Q T | T || T T | F || F F | T || F F | F || T According to the above truth table, the logical ...
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Are truth-claims inappropriate?

Strictly speaking, is it inappropriate to make a truth-claim? I am seeking an answer from Philosophy (Epistemology), and feel free to use logic I am speaking "theoretically", not "practically" I am ...
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How should we choose between different theories according to Rorty, based on Kuhn?

Popper tried to distinguish a scientific framework from a non-scientific framework ( like Marxism or Psychoanalysis, according to him) by suggesting the criterion of falsification. Kuhn suggested ...
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Are mathematical statements necessary truths?

I apologize if a similar question has been asked here, but I haven't found it. Are mathematical statements necessary truths? By 'mathematical statements', I mean both mathematical axioms as well as ...
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Can reason defend itself without resort to reason?

I recently read, "Reason can't defend itself without resort to reason." Is this universally true?
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If descriptive statements can be objective, why can't prescriptive statements? [closed]

Morals are just behavioral prescriptions carried out by some entity, a moral carrier. For a behavioral prescription to be valid, it must have a moral carrier. No moral carrier means no behavioral ...
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What is the difference (if any) between “not true” and “false”?

A fairly simple question I hope someone can help me with.
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Does Reality change when theory change?

I was going to include a caveat to prove a premise: to show that truth has become more subjective and then proceeding from older to newer theories of truth, I would cite a survey showing how ...
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What is taken as truth in philosophy?

First and foremost I should say that I am not educated in Philosophy; I study Mathematics. Essentially, the job of a mathematician is to prove theorems by logical deduction from axioms, which are ...
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Is the concept of “knowledge” important for philosophy?

I learned the definition of “knowledge” of justified true belief. I wonder whether it is important in any branch of philosophy? If I think about information per se, this boils down to technical ...
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Claims that we know (virtually) nothing - can they be refuted?

Here's an argument that I've heard a number of times from friends and on the Internet: "The ratio of what we know about the universe to what we have yet to discover is so small - it is therefore ...
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Is there such a thing as a 'necessary truth'?

Wikipedia (note the redirect) defines 'necessary truth' as statements which "could not be untrue", and I assume that this is how the term is usually used. A search through the SEP shows that while ...
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Is there a conflict between upholding rational justification and seeing societal norms as its ultimate source?

Societal norms in many philosophical schools has come to be seen as the end-all determinant of rational life. This attitude is displayed by Richard Rorty when he says "truth is simply a compliment ...
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The Truth-Falsehood Dichotomy and Logic

Some philosophers argue against truth bivalency, and say that not every statement must be true or false, but some statements can be untrue without being false, or truth-ambiguous, or both true and ...
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Can something be true if it does not follow logic?

Can something be true if it is not logical? Can something be true if it does not follow logic? if I can't deduce it logically? or if it contradicts logic? In other words: if someone says statement X ...
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What is the difference between justification, truth and belief?

I have seen "justification", "truth" and "belief" used a lot in Crash Course philosophy and would like to know some hard differences between the three.
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Why do we tend towards discretizing things around and within us?

Why do we tend towards discretizing things around and within us? Do our senses (for space and time) fool us into this notion all the way into the need for discretizing abstractions themselves, e.g. An ...
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Is there a single definition of truth?

Is there a single definition of truth in philosophy? Seeing multiple definitions has inclined me to believe that there is no proper definition of philosophy that everyone can agree on.
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Why are negative facts more 'shadowy' than positive facts?

Source: p 268 Middle, Introducing Philosophy for Canadians: A Text with Integrated Readings (2011 1 ed).   Second, the theory doesn't satisfactorily explain what true beliefs correspond to. With ...
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Is it possible to prove the invalidity of logic without using logic?

Is it possible to validly invalidate logic without using logic? Mere assertion gives rise to the question, "How do you know?". At that point, you end up having to use logic to justify the thesis ...
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Is truth telling important or just having good intentions is enough? [closed]

Are good intentions enough to warrant not telling the truth? I am especially interested in when we've already lied, and the point in question is whether we should confess. Do any philosophers write ...
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Can correspondence and coherence views of truth be compatible?

If in the course of interacting with an external world, a person is creating a set of coherent knowledge about this world, then there should be a mapping between their beliefs and the external facts. ...
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If all the premises of an argument are true, is the argument logically valid?

Where an argument is said to be logically valid "if and only if it is not possible for the premises to e true and the conclusion false". I know that the argument is indeed logically valid if all the ...
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How can we reach or realize the truth when our senses fail us?

Let us suppose that I'm phoning someone abducted or kidnapped and the criminal who kidnapped him is aiming the gun at his head and ordering him to lead me to the trap he has set for me (in this case ...
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Are there necessary truths in physical theories, more or less strictly speaking?

There are such things as mathematically necessary truths: 1=1, say; and logically neccessary truths: the law of modus ponens, say. But can there be one in physics? In Lewis's plural worlds where ...
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What are the facts and what is the truth? [duplicate]

As I ask this know; I purely ask this from a social point of view. As in conversations with others. It's a random thought and kinda funny when I started thinking about it. What's a fact? Something ...
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What is the common term for 'epistemological preference'?

I got this term explained to me that was called epistemological preference which is basically your preference for acknowledging the truth. There are four categories: Truth by authority - this is ...