A question remains though: Can chemistry (or biology for that matter) be reduced to physics? By that it is typically meant "Can problems of theoretical chemistry be reduced to The Standard Model?" See *List of unsolved problems in chemistry* - https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_chemistry Except for a leap of faith ("The Standard Model can explain all of these open problems in chemistry"), there could be chemical properties not reducible to physical properties. If that is the case, what is physical (as I have defined physical) does not cover what is chemical (much less biological). Matter includes all levels of "stuff": physical, chemical, biological, psychical. So materialism is the agnostic position: It doesn't matter whether everything can be reduced to the physical or not. In "replace one or more of your neurons with a mechanical yet functionally equivalent replacement", mechanical could of course include biomechanical (as defined in *synthetic biology*), as there was no restriction of "mechanical". - pt -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.