Risk Evaluation Risk cognition studies the relationship between risk and human heart.
In the field of Risk of Chemical Substances and Reliability Engineering, Risk is defined "occurrence probability * size of effect ". But those fields do not say such definition is enough or not to treat risk. If we recognize risk with occurrence probability and size of effect, production of them is not the only definition. Production is one of risk models with easy function.
Risk cognition studies the cognition of occurrence probability and size of effect. And it studies risk itself without the production model. Risk is a mental criterion.
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