In this book Dr Edward de Bono puts forward a direct challenge to what he calls the rock logic of Western thinking. Rock logic is based on rigid categories, absolutes, argument and adversarial point scoring.
He believes that this thinking is not creative and thus cannot help us solve our problems and create a better future.
Instead of rock logic he proposes the water logic of perception. He believes this to be the key to more constructive thinking and the serious creativity of design.