This paper presented some philosophic viewpoints of the Theory of BMKI (The Theory of Biomedical Knowledge Integration), a new exploration in BioMedical Informatics. It discussed an evolutional relation from propositional calculus, predicate calculus, through framework, to neural network.. The differences in exclusivity and other natures were explored for physical systems (the real world), quasi-physical systems (the copies of the real world) and mental systems(the abstracts of the real world). Based on their behaviours in cognitive sciences and knowledge engineering, the new concepts quasi-infinity or -infinitesimal,potential knowledge,dynamic knowledge were introduced. This paper has also described so called "big-or" space which is the base of scientific understanding or association. Furthermore the paper put forward the viewpoint that "reasoning only can implement in an axiomatic space" and then outlined the building processes of such kind of space. At last so called "beacon-andcompass strategy" in BMKI was introduced.
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