So the point is that it is a sentence that demonstrates a problem with using unpackability as a requirement for qualifying as meaningful English? That seems reasonable.
Note that the universal “All sentences are either true or false” also, doesn’t appear to meet the unpackability requirement, though I’m not confident I know how to make a Tarski sentence out of that.
So the point is that it is a sentence that demonstrates a problem with using unpackability as a requirement for qualifying as meaningful English? That seems reasonable.
That’s what I got from it.
Note that the universal “All sentences are either true or false” also, doesn’t appear to meet the unpackability requirement, though I’m not confident I know how to make a Tarski sentence out of that.