...there's a dog in front of you, on a rug. You say, "The dog is on the rug".
- What you said is true.
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The truth of what you said is related to the meanings of your words.
- It seems we should be able to say something useful about what meaning and truth are, which would explain these facts.
- It turns out this is a hard thing to do.
The project developed here attempts to do this hard thing.