What is Magical Number Seven

This chapter investigates the threshold of context memory on numbers 300 through 500 regarding perspective with assumption experiment and theories of cognitive semantics and short-term memory. Context generation became possible with text database with lexical engineering system on artificial intelligence (AI). It was realized an infinite and continuous presentation of context. Several context presentations realized the limitation of context memory on the process of continuous context presentation on numbers 500 and 2,000, as well as the representation process with judgement for memory. The first report studied the context generating machine for Japanese pun generation. This was termed “Class B engine” or “Dajare Machine.” This study focused on the examination of the context threshold using an experiment of human brain mapping on an auditory evoked magnetic field (AEF) of a magnetic encephalogram. It also focused on the analysis of the theory of cognitive semantics and folk biology, using a theory of short-term memory of the “magical number seven.”