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Cf. the page [[what it is like to be]]. This can be applied, e.g., to mental states: 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"/>). The content of a mental state which generates the property required here is often claimed to be private (non-public) in the sense that it is only available for the person that exhibits this mental state.