Are there any philosophers that affirm the substantiality of consciousness

Are there any philosophers that affirm the substantiality of consciousness

Are there any philosophers that affirm the substantiality of consciousness without either falling into dualism or property dualism? I personally think that mind is a genuine reality but I'm not so certain that it is a substance in the sense that it is a reality with purely mental properties that exists separately from anything else. But I personally don't think property dualism is a viable alternative either.

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