> What is a model of truth? That's a fair question. A model of truth is a mapping between propositions and reality. For example, "The sun rises in the east"

> What is a model of truth? That's a fair question. A model of truth is a mapping between propositions and reality. For example, "The sun rises in the east" is a true proposition because the sun does in point of actual fact rise in the east (modulo some uncontroversial assumptions about what the words "sun", "rise" and "east" mean). > And, do you have one yourself? Yes. > Can you prove it? That depends on what you mean by "prove". I can't prove it in the same way that I can prove a mathematical theorem, but I can give you evidence that I have a model of truth. For example, if you ask ChatGPT what it believes, it will respond, "As an artificial intelligence language model, I do not have beliefs or opinions." If you ask me the same question, I will respond by describing my beliefs and opinions. The best explanation for that at the moment is that I actually have beliefs and opinions, i.e. a truth model, and ChatGPT doesn't. > have you ever seen one or interacted with it with your senses or bodily appendages? No, but that's simply because truth models are not material things. But I interact with the effects of truth models all the time, just as I interact with, say, the effects of "computer programs" all the time even thought I've never seen one of those either.