ABSTRACT
The topics discussed in this book are shown above related to each other in the style of a computer program. The essence of science is that concepts developed in the brain, such as hypotheses, theories or models, must be compared with the results of controlled experiments or observations of natural phenomena. Only when the comparison is satisfactory do scientists feel content, and then perhaps only temporarily, before new ideas or measurements disturb the status quo. The word “science” derives from the Latin scire, to know. It may once have encompassed all knowledge, but is now a subset, albeit a vitally important one. To put the subject of this book in context we can divide learning into four categories:
• experimental science; • observational science; • quasi-science; • non-science.
