About faults, errors, and other dangerous things

The traditional paradigm for learning and training of operators in complex systems is discussed and criticized. There is a strong influence (the doctrine of `mental logic') coming from research carried out in artificial intelligence (AI). The most well-known arguments against the AI-approach are presented and discussed in relation to expertise, intuition and implicit knowledge. The importance of faults and errors are discussed in the context of a new metaphor for cognitive structures to describe expertise, and how knowledge about unsuccessful behaviour influences the actual decision