h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

An inner mental creation of imagery and feelings using five of the most used human senses, based upon real experiences and emotion. It is impossible to imagine something that you don't have the 'mental ingredients' to make. For example, you cannot imagine a colour that you have never seen before. For creating sounds, feelings and images of things that you have never seen before you are only mutating and splicing current stored information. Often when the process of creating an imagined 'thing' is complete, this is sometimes known as an 'Idea'. Everyone has their personal 'Library' of imagination, a mental scrap book, what you may see if someone says to you the word 'Chair', what do you think of as a standard chair shape? a wooden one? metal? cushioned? do you see an actual chair? or just a flash of a baby book picture of a chair? Obviously if you start to think about it, then its too late, i am talking about the stage before your brain gets a chance to think, because when the brain thinks, and you can hear yourself thinking then you already know what you are thinking about before you think it.