Peter

Ah, yes, they're good e.g.s. Unfortunately, they also involve breaking linguistics :) When you talk about a language having different words for different concepts, you're looking at good old fashioned etymologies and traditional semantics and so on. But when you talk about people meaning something different by the way they emphasise a word, you're into the field of pragmatics (which is all about why things mean what they mean in context), which is a relatively new concept[1]. Obviously when talking about philosophical and to some extent psychological aspects, this is perfectly justified. It's just a by-product that my head responds by dividing the two concepts and keeping them separate :)

[1] A case in point re pragmatics: 'relatively new concept' means something a bit different to a classicist like me from what it might mean to e.g. a modern linguist ;)