There’s a class of truths whose source is our belief in them, i.e. they are true, because we believe they are true. E.g. in most countries there is right-hand t

There’s a class of truths whose source is our belief in them, i.e. they are true, because we believe they are true. E.g. in most countries there is right-hand traffic, which is true based on people’s belief that it’s true. Of course it’s written down in law, but the only reason this law has this much power is because people believe in it. Similarly Europe exists, because people believe it exists. But none of those things are lies. They’re no less true than the fact that water boils at 100°C. In case of traffic you may even check the full power of human belief by driving in the other lane. ;) (There was some clever Latin/Greek epistemological name for it, but I’ve forgotten it.)