We must purge our definition of matter from its dualistic overtones. If we want to escape from the dualism-monism quandry, we must enlarge our concept of matter to include the human mind with its full potential . . . instead of trying to shrink our view of the mind so as to make it fit inside our preconceived, "materialistic" definitions of matter. We must view the mind as a special manifestation of matter.

If this means invoking a property not yet included in the description of physicists, this would not be the first time.
p. 259
Christian de Duve Vital Dust: Life as a Cosmic Imperative
Basic Books, 1995

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