To know anything (an X) completely you need perfect knowledge. Hence people come up with a set of simplified ways of reasoning about X. They call this a model of X.
Model is incomplete and so primitive that we manage to play it forward/backward in our heads or our computers.
If a model checks out with the real outcomes we proudly exclaim that we understand X.
I'm not being sarcastic, that is just a real method we use all the time.
Agreed.
> Hence people come up with a set of simplified ways of reasoning about X. They call this a model of X.
A "set of simplified ways of reasoning about X" in order to create a "model of X" does not imply complete understanding. Quite the contrary actually.
To wit, science often models current understanding of a phenomenon. When new evidence (understanding) is discovered, the model is updated to account for it. Sometimes this invalidates the original model, often the model is refined. Either way, progress is made with the tacit agreement that the model may change in the future.
> If a model checks out with the real outcomes we proudly exclaim that we understand X.
Again, this does not support the assertion of "That's been solved long ago." If anything, it affirms there is justification for disagreeing with the original premise to which I responded:
> We just can’t accept that we might solve ourselves.
To solve ourselves is to know ourselves completely, and to know ourselves completely is to be honest in who and why we are what we are simultaneously across all persons. It assumes perfect knowledge.
There is no statistical approximation nor computational power which can do this.
> People are understandably desperate to understand their experiences as more than an encoding of a thing that might be explained.
Another way to frame this is, "some people are nihilists and do not see life as more than an encoding of a thing that might be explained."