0:00 The statement "the sky is blue" is true.0:03 Or...0:03 is it?0:04 I mean, we all agree on it.0:06 We see it.0:07 But last week, in Episode 17, we wrestled with knowing evil, and it left me thinking you can't even get to that question without backing up first.0:19 How do we know anything is true?0:22 Right.0:22 Because that simple statement, "the sky is blue," rests on a huge assumption.0:28 It assumes truth is something that, uh, corresponds to reality.0:34 That's the first big idea, right?0:36 The Correspondence Theory of Truth.0:39 A statement is true if it matches the world.0:43 The cat is on the mat if, and only if, there's a cat and it's on a mat.0:49 I get it.0:50 It feels intuitive.0:51 It's how we operate ninety-nine percent of the time.0:55 But...0:56 what about a truth like "justice is good"?0:59 Or even "two plus two equals four"?1:02 What physical reality does that correspond to?1:06 Exactly.1:07 There's no "four-ness" out there in a field that we can point to.1:12 So, um, some philosophers pivot.1:15 They say, okay, maybe truth isn't about matching the world.1:20 Maybe it's about how our beliefs fit together.1:24 That's the Coherence Theory.1:26 A belief is true if it's part of a consistent, logical web of other beliefs.1:32 Huh.1:33 So the truth of "2+2=4" is that it doesn't contradict everything else we know about mathematics.1:40 It...1:41 it coheres.1:42 Mm-hm.1:42 But you see the problem.1:44 You could have a perfectly coherent set of beliefs that is completely detached from reality.1:52 I can write a fantasy novel with flawless internal logic.1:57 Every statement is consistent.1:59 But that doesn't make it TRUE.2:02 Okay, so correspondence has holes, coherence can lead you to a fantasy land...2:08 what's left?2:09 Well, then you get the pragmatists, like the philosopher William James.2:15 They came along and said, look, the truth is what works.2:20 What's useful.2:21 What has, in his words, "cash-value in experiential terms." A belief is true if acting on it leads to good, practical outcomes.2:31 I...2:32 I don't know how I feel about that.2:35 It sounds so...2:36 transactional.2:37 So if believing a lie helps me succeed, does that make the lie true?2:43 If a whole society believes something that makes them happy and productive, even if it's factually wrong...2:51 is it true for them?2:53 That feels dangerous.2:55 It IS dangerous.2:56 And it leads directly to the most challenging idea of all, which is constructivism.3:03 The idea that we, as societies, as language-users, actually create truth.3:09 We don't find it; we build it.3:12 There is no objective, God's-eye view of reality.3:16 We're always inside our own system.3:19 Whoa, hold on.3:20 So...3:20 the laws of gravity aren't an objective feature of the universe?3:25 They're just a story we've agreed on because it's a useful one?3:31 That can't be right.3:32 If I step off a building, I'm not gonna fall because of a social agreement.3:39 No, you're not.3:40 And constructivists wouldn't say there's nothing out there.3:45 There's definitely...3:46 a something.3:47 But our description of it—"gravity," "mass," "spacetime"—that's the human-made part.3:54 It's a model.3:55 A powerful, predictive model, but still a model.3:59 We can't access the raw reality underneath it.4:03 So we're just trapped in our own descriptions?4:07 There's no...4:08 bedrock?4:09 Maybe the bedrock isn't a thing we find, but a thing we commit to.4:14 You know?4:15 Maybe the point isn't to possess some final, singular Truth with a capital T.4:21 Maybe the real virtue is in the process.4:25 The commitment to always be checking our ideas.4:29 So...4:29 checking them against the world, like the correspondence people say...4:35 Yeah, and checking them for internal consistency, like the coherence people say...4:42 ...and checking what happens when you live by them, like the pragmatists say.4:48 You're not choosing one theory, you're sort of...4:52 using all of them as tools.4:54 As a discipline.4:56 Exactly.4:56 It's less about having the truth and more about being truthful.5:02 It's an action, not a possession.5:04 That's a very different way of looking at it.5:08 It puts all the responsibility back on us.5:12 It's not about finding a map that's already been drawn.5:16 It's about the act of drawing the map, together.5:20 So if truth is something we're constantly making...5:24 what kind of world are we choosing to make with it?
