Having said this, I do admit that I was aware of your flawed and/or incomplete understanding of “matter” (I notice that you conveniently slipped in “matter and energy” in one of your follow-up posts, though it was but a quote from someone else - well, at least we are progressing) and so “anti-matter” was at least partly tongue-in-cheek (though it is of course a completely accurate example within that list, so this is in no way a takeback). I can now confirm that you are using a definition of “matter” that owes more to armchair philosophy than to laboratory science. I notice also that you had nothing to say about the other things on that list. It is a damned shame that your agreement and/or lack of rebuttal is displayed only through a pointed refusal to acknowledge the same. Shrug. So, I ask again, is space-time also “matter”? Is its curvature also “matter”? Is a quantum wavefunction also “matter”? Is there any point to my continuing to treat this so-called conversation seriously? Even some post-modern philosophers are jumping on the quantum bandwagon, trying to explain away their delusions by using the “magic of the quantum” . Wouldn’t it be more accurate to say that “matter” is whatever you do not want to pray to - or to put it another way, “matter” is whatever you wish to apply the adverb “merely” to (as in, something is “merely” matter) while saving all that saccharine awe and reverence for the imaginary world of the “supernatural”?