Ending a question with the client's own words 'rhymes' with them even though it may not be grammatically 'right'. This often means that Clean Language is very easy for the client but operationally very hard for the questioner. The pessimist's view is that you're only as good as your last question. Optimists, however, believe that you're only as good as your next question. A good way to end a session, David suggested, is to ask the client what questions of yours were not good question and which questions would have worked better.
Imagery is our primary processing system, and language our secondary.
Symbols are closer to images than they are to verbal descriptions, and so a person might be able to see or imagine a symbol without being able to fully describe it. Clean Language works with this unseen and un-verbalised description, it can work with movements, gestures, coughs, lines of sight and so on, it doesn't depend on the client being able to provide a full linguistic description of a symbol. This is what David termed being an equal opportunities employer, not discriminating against other forms of information. In the approach of Clean Language there is information held in the choreography of that hand gesture. Clean Language is about the management of time and the management of space.