The word is 'ebne'. This means 'excellent but not enough'. Our culture of thinking insists that you must prove something wrong in order to ask for a change - hence argument and that idiom. The rear left wheel of a motor car is excellent. There is nothing wrong with it at all. You cannot criticise it. If , however, you believed that a rear  left wheel was sufficient by itself then we have a clear case of ebne. A man with one leg has an excellent leg but it is ebne.

Our existing thinking system and methods are ebne.

They are excellent in themselves but not enough.

Edward de Bono