>>It's not that the discussion is simply derailed. It's that it can't even take place until both parties agree on the terminology.
On a theoretical level, this is true for every discussion in every discipline. On a practical level, how would you know that this is a special problem in philosophy if you admit that you haven't studied any?
>>That's the problem. Nearly every word is packed with meaning, which must be unraveled and argued for with... more words.
Just for the record. I did say that arguments are required and of course those arguments are composed of words (and symbols) but i never said that those arguments are about the meaning of words.