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This is closely related to [[consciousness#Access consciousness|access consciousness]].

According to a second general variant of the unary predicate of mental states connotation of consciousness, mental states are conscious ''if we experience'' [[what it is like to be]] in the respective state, or ''alternatively'' if ''there is something'' [[what it is like to be|it is like to be]] in that state. A third, closely related but distinct notion would be to define a mental state as conscious if we know of the mental state's qualitative features ("Kenntnis der Erlebnisqualitäten" in German<ref name="MetzingerLexikon"/>).