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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116 views

Does many valued logic hold in unambiguous cases?

My understanding of many valued logic is that it is used in cases where an aspect of a proposition is vague or not well defined. The example Wikipedia gives is: 'This apple is red.' Upon ...
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Is it valid to prove the axioms of a system from themselves? How does it square with Gödel's incompleteness?

I recently asked whether the axioms are tautologies, and got comments that seemed to me highly suspicious. Namely, that you can always prove an axiom from itself, that you can trivially say A ...
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How do we define a fact?

Got into a discussion today with my Semiotics professor regarding this question and I still had questions in my head on the way home. He was stuck on the notion that facts have just become things ...
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588 views

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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Can happiness be measured quantitatively? such that an amount of money can buy [closed]

There is a cliche, which is often used by the middle class, saying that happiness cannot be bought and supporting their thought by stating how many rich people suicide or constantly go to ...
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Textbook(s) on epistemology

I was following a course on Merleau-Ponty​ and realised from the first few readings that I knew too little about theories of truth to truly appreciate what I was reading. Are there any books I could ...
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What is an accurate description of truth?

I am writing an essay how there can be disagreement when people or experts are provided with the same facts. Now I mentioned that while the same facts might be present, the truth people might ...
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What in the philosophy of science makes it not mathmatics? What would I ask someone to filter out the bad faith? [closed]

I recently had someone make an argument from a mathematics background, to argue a point that had no actual correlation to the material world. When I began I asked them if they accepted objective ...
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Help me understand coherence theory of truth

According to Wiki: Coherence theory of truth regards truth as coherence within some specified set of sentences, propositions or beliefs. There is no single set of such "logical universes", but ...
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Is there a logical way to look at “alternative facts”? [closed]

There have been a lot of laughs about the term "alternative facts" (as used by the incoming US administration), but are there logical or philosophical frameworks for the types of distorted truth-...
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281 views

If little philosophical consensus could be reached, could philosophy be defined as a negative study?

This is just a very random idea that came across my mind. I wish to have this unlearned opinion judged by a more academically rigorous community. I was thinking the other day that, since very little ...
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How can anyone who hasn't realised the truth claim that Mahatma Buddha or any other person in history realised the God or Truth?

Isn't it possible that whatever they have realised is just a psychological effect? Doing continuously hard practices leads to affect their mind and they tend to believe that, yes, this is the truth. ...
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Do any moral philosophers discuss 'validation'?

Do philosphers of ethics talk about validation? The idea that my life or projects or person have some intrinsic value, specifically not just those that are innate to persons? Maybe my tags seem a ...
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Can moral behaviour be based on a lie?

If knowledge implies justified belief, as is traditionally supposed, then skepticism about justified moral belief implies skepticism about moral knowledge. However, even if knowledge does require ...
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What philosophical views exist on the nature of honesty?

What are the best or best-known philosophical treatments of the concept of honesty? Can you please briefly summarize some of the I'm most interested in sources which tackle questions such as: What ...
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Is finding truth possible?

Consider the following argument: If want to know that something is true, I need to first know what is truth. If I need to know what is true, I need to find the truth. (Is there ...
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Why do we need to know the truth?

I think it is safe to assume that most people go about their lives with an incomplete knowledge of the world. All humans have a short life full of questions without any absolute answer. Question 1: ...
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Is it possible to have an original thought and express it in english?

Given that we have learned English and all the words are defined for us, is any combination of words we string together and speak/write an original thought? Or since all the definitions of words ...
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Can truth be the ultimate goal?

You want your child to tidy up his room. What is the "right" thing to tell him? A) aka "the easier way": you tell him he will get presents for christmas if his room is clean (Bonus: because Santa ...
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Does anti-realism say that what we can't know isn't true?

Has anyone, in the history of philosophy, ever objected to anti-realism that then our thoughts aren't about anything except our own minds and such that supposing we believe we have contacted a "shell" ...
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Why is Tarski's semantic conception of truth simply ignored in mathematical logic?

As far as I understand, Tarski's semantic conception of truth (T) X is true if and only if p (where p is a sentence of the object language whose truth value is in question, and X is the name of the ...
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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 ...
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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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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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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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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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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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594 views

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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