Basically, we have a mental model of logic the same way we have a mental model of geography. It’s useful to say that logical facts have referents for the same internal reason it’s useful to say that geographical facts have referents. But if you looked at a human from outside, the causal story behind logical facts vs. geographical facts would be different.
https://www.lesswrong.com/posts/mHNzpX38HkZQrdYn3/philosophy-of-numbers-part-2
Basically, we have a mental model of logic the same way we have a mental model of geography. It’s useful to say that logical facts have referents for the same internal reason it’s useful to say that geographical facts have referents. But if you looked at a human from outside, the causal story behind logical facts vs. geographical facts would be different.