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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139 views

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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Did Poincaré misunderstand the nature of a priori truth?

In his article "On the Foundations of Geometry", Poincaré goes through an extensive discussion to establish that our experience of motion may be properly regarded as displacements. This is requisite ...
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The Difference Between Truth and Reality. And what does fact stand for?

I'm interested in the different forms of actuality. Fact For me fact must be a constant, base level of deducted 'fact'. Something that cannot be disproved. For instance, fire is hot. Fact is ...
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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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How are you intended to interpret x.R and x.S in Davidson “Truth and Meaning”?

I'm entirely unfamiliar with the syntax and corresponding semantics Davidson uses for the four equations at the beginning of Truth and Meaning. He states that the following sentences are supposed to ...
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114 views

Does physicalism imply no truth?

It seems to me that the act of searching for truth, finding truth, and expressing truth is all just transformations of matter (and energy). For example, suppose I am proving some mathematical theorem....
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Are there cases or arguments where the Truth Table is not reliable?

Below is a basic Truth Table where p can represent the first argument and q for the second argument. +-----+-----+-------+-------+ | p | q | p ∧ q | p ∨ q | +-----+-----+-------+-------+ | T | ...
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Tarski's conception of truth for formulas of infinite length

Does Tarski's semantic conception of truth, in particular, his convention (T) (X is true iff p), extends to formulas of infinite length?
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192 views

Why isn't “I am Bill” a proposition?

In fleshing out the traditional definition of omniscience, William Lane Craig distinguishes between propositional knowledge and non-propositional knowledge, claiming that to be omniscient is to know ...
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Does this justify truth-table of material conditional?

I'm sure someone has thought of this before, but I haven't seen this justification (if it is one at all) for why the truth-table of the material conditional is the way it is in both literature on the ...
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767 views

Can a sentence without a truth value be true?

I was doing some very, super, light reading on self reference. It seems to me that the statement nothing that I say is true both: cannot be understood with the T-schema; is self referential. - ...
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What can I research in terms of philosophy that is relevant to logic and programming?

I'm interested in anything about examining statements, truth and what is a valid argument in the context of a debate. Feel free to add further suggestions according to the question.
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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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Does Coherentism lead to relativism?

Source: p 273 Top, Introducing Philosophy for Canadians: A Text with Integrated Readings (2011 1 ed). Primary Source: 'Could Truth Be Coherence with a System of Beliefs?' by Uni. of Victoria Prof. ...
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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 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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Truth Value of Sentences Containing Logical Contradictions

Do propositions containing logical contradictions have truth values, or are they meaningless? For example: A) Some married bachelors exist. B) 95% of married bachelors live in Maryland. C) ...
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Self-referring propositions

This proposition is false As you can see in the proposition above, there is a problem. This sentence can't be true, but it can't be false either. I believe that this issue comes from the fact that ...
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To Check or not to Check? [closed]

Samuel and Paul make a wager. They want to know if a certain professor held class the day prior when they were absent. The professor is unreachable, though, so they have to ask students from class. If ...
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Why does what I've written fail to define truth?

(Also posted in mathstackexchange prior to this). I stumbled across a set of axioms for first order logic a bit ago. Intrigued, I decided to try to write it all down and organise what I read. After I ...
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Tarski's semantic conception of truth

Does Tarski's semantic conception of truth X is true if and only if p (where X is the name of a sentence, and p is the sentence itself) apply to all sentences or only to facts (understood as ...
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Tarski's original proof of the undefinability of truth

I'm trying to understand Tarski's proof of the undefinability of truth as given in his paper The Concept of Truth in Formalized Languages (English translation in Logic, Semantics, Metamathematics, ...
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What is the nature of pragmatism as a claim? Can pragmatism ever be understood as a claim in light of its own conditions?

Pragmatism is the suggestion that truth-value and meaning should be talked about in terms of the way we use those terms. All such talk should be hashed out in terms of the practical bearings of such ...
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Are all self-evident truths necessarily redundant?

Every justificationist theory of knowledge has axioms and premises that it begins with. This fact has led skeptics to criticize the possibility of knowledge by noting the infinite regress within any ...
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What makes a relation 'satisfactory' under William James's pragmatist account of truth?

William James wrote that "Ideas ... become true just in so far as they help us to get into satisfactory relations with other parts of experience" (James 1907). What makes any given relation more '...
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Is there a way to avoid Gödel's incompleteness affecting mathematics as a whole?

I have been thinking about Gödel's incompleteness theorems and their ramifications for the whole of mathematics. In this question I assume some fixed formal system F expressive enough for the ...
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Is the claim that atheism is the null hypothesis invalid because it applies a physical measurement to the metaphysical?

I've heard several people state that: Atheism is the null hypothesis. ie that this null hypothesis can be falsified: if one piece of evidence is found to contradict it, the existence is considered ...
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If “All S is P” is true, does it contradict “No non-S is non-P”?

I have a problem I encountered in a logic textbook that I cannot figure out after multiple tries. Say we assume that "All S is P" is true. Does this allow us to conclude the truth value of "No Non-S ...
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Can we have knowledge if it all turns out to be untrue?

Can every apparently true belief turn out to be untrue: and what is the word for this stance? I would assume it would mean we have no knowledge: is that right? Someone on a forum I use keeps ...
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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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Can the correspondence theory of truth really be completely avoided?

Let us assume that 'truth' is a construct of the human mind. In this case truth is defined as some product of the mind's 'verification', and nothing else. What 'makes' a statement true is simply the ...
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How Can the Unobservable be Verified?

Empirical evaluations and judgments concerning the observable world (e.g. whether or not I'm eating a watermelon right now) are evidently verifiable; you can confirm that I am indeed eating a ...
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Are there exceptions to the principle of the excluded middle?

It is inherent in our truth tables that we configure a statement to be either true or false, but it seems that this might have certain exceptions, especially in conditionals. For example, the ...
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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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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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Is Tarski's theory of truth compatible with intuitionism?

Intuitionistically, truth is identified with provability: A is true means that it is possible to prove A. In his essay "Intuitionistic logic a philosophical challenge, Logic and Philoshophy" (1980) ...
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Is “Truth” something like a Dirac Delta Function?

To me, Truth is simply what is the case. It is not a matter of reasoning, and it could not be otherwise. Knowledge is a set of beliefs which accord with reality (what is true). Beliefs can be false. ...
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Granted Hume's psychological perspective regarding impressions and ideas, doesn't this make his epistemology obscure?

Hume held that all that was meaningfully present to the mind consisted in matters of fact (impressions) and relations of ideas. But even ideas were faint impressions themselves, formed over time by ...
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What is the difference between real and nominal definitions?

What is the difference between real and nominal definitions? Is it philosophically accurate to say that real definitions (as opposed to nominal definitions) can be true or false? Take for example, ...
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What is the relation between proof in mathematics and observation in physics?

Recently in his 2015 Hirzebruch Lecture in Bonn, Arthur Jaffe re-amplified his famous perspective that finding proof in mathematics is analogous to making experimental observation in physics. In ...
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What is the philosophical difference between “Reality” and “Truth”? [closed]

While talking philosophically, I want to know the difference between Reality and Truth. Especially while Asking this question, I've used Reality/Truth because I don't know How they are different in ...
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Why might truth imply necessity?

It seems well established (or, well-accepted) that necessity implies truth. For instance, in a context of epistemic logic, if one knows A, then A is true. On the other hand, I found on the Internet ...
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Using the conception of 'reliable, unchanging' does 'truth' exist?

An 'archaic' definition for TRUE,TRUTH implies constancy, reliability, unchanging, fidelity. Using this concept of TRUTH is the following valid? There exists either that which is TRUE or that which ...
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Why does one need 'proof' that God exists - What constitues 'proof'?

Does something need to have proof demonstrated for it to be true? If I say "I love my wife!" but you don't buy it... does that mean it is not true?
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How does strong evidence imply truth?

I have seen a great number of individuals who take a step from "There is overwhelming evidence to suggest theory X is true" to "Theory X is true." (I think I misworded the former sentence ...
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Truth and wavefunction [closed]

Well to be honest, my major is physics. And I only started some low level philosophy recently. So please criticize my opinions so that I can advance more quickly. :-) My problem started with Russell'...
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What are Nietzsche's views on truth and logic - for real this time

I'm trying to make sense of Beyond Good and Evil and Nietzsche's views at that time. The claims he makes about truth and logic seem problematic to me: "Granted, we will truth: why not untruth ...
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What is the current state of the Correspondence Theory of Truth?

Is the Correspondent Theory of Truth currently the most important way of thinking about the nature of truth? What alternatives are important? Is there a version of the Correspondent Theory of Truth ...
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Relation between an argument and false premise on Knowledge

If I argue something from a premise such as "It's raining where I wrote this question" which is contingent false, then is it true that I could argue or deduct anything? For example, from the premise ...
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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 ...