re: differences in SLT.
we all speak the same language. however, subtle differences arise because of accents, tones and inflections.
it is far more important to ensure that we are effective communicators than examining subtle differences between us.
to test our effectiveness we must convey messages in the most efficient manner, to those who speak different languages.
`When I use a word,' Humpty Dumpty said, in rather a scornful tone, `it means just what I choose it to mean -- neither more nor less.'
`The question is,' said Alice, `whether you can make words mean so many different things.'
`The question is,' said Humpty Dumpty, `which is to be master -- that's all.'