ABSTRACT
This introduction provides an overview of key concepts discussed in the preceding chapters of this book. The book explains what is regarded as common sense by following a group of people on a fictitious island who cannot fall back on the advice of experts. It also elaborates a number of presuppositions related to the scientific orientation that nowadays dominates people's daily lives. The book also shows what one can gain if they use their common sense. People are talking animals. They use their voices when they introduce themselves. One crucial aspect of medical vocabulary and the medical profession is that the diagnosis, treatment and theory-building are independent of their own GP's individual characteristics. The ancient Greeks made no distinction between philosophy and science. This investigative attitude can be seen as the anteroom from which a possible missing information subroutine can be started as soon as it is clear that there is indeed some information missing.
