|Definability: is about the question whether the meanings of linguistic elements and symbols of a statement in a given frame, a theory, a model or a system can be stated in a way that these elements and symbols can be replaced by other symbols. This replacement is to aid understanding. Is this the case new symbols (words, terms, links) can be created the meaning of which can be understood from the symbols already defined. Therefore these new symbols are definable. See also definition, context definition, implicit definition, explicit definition, models, systems, theories, foundation.|
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Definition/Volume/Gas/Liquid: after all we know, there is no really defined volume for each molecule. If we change the temperature, it does not remain constant.
It cannot be defined. (>Measurement).
Vom Wesen physikalischer Gesetze München 1993
Vorlesungen über Physik I München 2001