Yes, it suggests that language and logic can only map out a fraction of reality. At least, that is my impression.
On the contrary, language defines the very limits of our world. We can only articulate what we are able to perceive through language; anything beyond that remains a mystical experience that defies expression.
I agree; it might be more intuitive to view that rule as a contradiction.
No, I wouldn't call it a contradiction, per se; rather, it simply isn't necessarily true in every instance.
, though my real-world experience suggests that statement holds quite a bit of weight.
That seems to confirm the core solipsistic thesis. It suggests that this rule feels truer to you than it does to me. You may disagree, but perhaps that only illustrates how different our individual worlds actually are. This is merely a small indication.
Furthermore, the misunderstandings born from our differing uses of words seem to prove that language itself forms the boundary between our respective worlds.
even if it wouldn't hold up in, say, mathematics.
Quite the opposite—because it wouldn't hold up in the physical world, it wouldn't pass in math or in language either.
But for you, it would, which is the essential point.
Forget this debate and go hit some laps in the pool.