Epistemic background problems of uncertainty

Basic quality of uncertainty is uncertainty itself. This statement is proved by analysis of the different kinds of uncertainty, the different model-origins of the various calculation methods which relate to different semantics. Logic and language are deeply connected with these uncertainty interpretations as uncertainty representations work like switches among different possible worlds. The human brain´s answer is different, it is based more on pattern-like coherence structures. The epistemic analysis of models is a practical tool for design and selection of computation tools