What is truth?

[Merchant31]

The word gets thrown around as if everyone already agrees what it means, but philosophy has never actually settled on a single account. The correspondence theory says a statement is true if it matches some fact out in the world, the cat is on the mat is true exactly when there really is a cat on that mat. It feels like common sense, but it quietly assumes we have some independent way of checking a statement against the world that does not itself rely on more statements, which turns out to be harder to pin down than it sounds.

The coherence theory takes a different route, saying a belief is true if it fits consistently within a wider web of other beliefs we already hold. This handles abstract claims, like statements in mathematics or ethics, that do not obviously correspond to any physical fact you could point at, but it opens the door to a perfectly self consistent system of beliefs that is nonetheless completely disconnected from reality, coherent and false at the same time.

Pragmatists offer a third option, truth is whatever belief actually works, whatever reliably lets you predict outcomes and act successfully in the world. That is appealing for science and everyday life, but it makes truth sound suspiciously close to usefulness, and plenty of useful beliefs throughout history, from certain simplifying models in physics to comforting illusions, were later shown to be flatly false despite working well enough for a long time.

Deflationary views try to sidestep the whole fight by saying truth adds nothing substantive to a claim at all, saying it is true that the cat is on the mat just means the cat is on the mat, full stop, and the concept of truth itself is more of a linguistic convenience than a deep metaphysical property. Whether that dissolves the problem or just refuses to answer it is itself a live argument.

[NorthernKernel]

Correspondence is intuitive until you try to specify the independent fact you are supposedly comparing a statement against without using more statements to describe it, and at that point the whole theory starts to feel like it is standing on something it cannot actually show you directly.

[Southern Joanne]

Worth noting these theories are not always mutually exclusive in practice even though they get presented that way in intro philosophy courses. Science leans correspondence for observable claims, math leans coherence internally, and everyday reasoning leans pragmatic more often than people openly admit to themselves.

Treating truth as a single unified concept might itself be the mistake, the same way treating cognition as one thing turned out to be a mistake in the AGI conversation happening elsewhere in this forum.

[DarkMerchant]

What strikes me is how much actual disagreement in politics and public life is really a disagreement about which theory of truth people are implicitly using, rather than a disagreement about the specific facts themselves. Someone reasoning pragmatically and someone reasoning by strict correspondence can talk past each other for hours without ever noticing the real fork in the road.

[ProperJobs50]

The deflationary view feels like the most honest option once you actually sit with it, since it stops promising a grand metaphysical theory and just describes how the word functions in ordinary language. Whether that counts as answering the question or quietly giving up on it depends entirely on what you originally wanted from an answer to begin with.

[Leopard]

Pragmatism collapsing truth into usefulness is exactly the objection that always gets raised, and honestly I think it is a fair one, since flat earth navigation worked well enough for a long time despite being false, which shows working and being true can genuinely come apart in practice.

[Thomas_69]

Coherence handling abstract claims well is the strongest point in its favor for me, since correspondence genuinely struggles the moment you leave physical objects behind and start talking about numbers, obligations, or possibilities that were never going to have a matching fact sitting out there to check against.