The phenomenon of dry-stiffness demonstrates that an abundant medium is not a necessary condition. Dry-spores and dry-sleep ( bärtierchen (Tardigrada)) show the gradual non-necessity of the system-medium, and with it its subordinated status, and many injurious acts, while sparing the system-medium, result in the death of the organism and therefore characterizing it as substance. Compare also damage or death as a result of cold, i.e. damage or death caused by mechanical disruption of bonding chains [in the mega-molecule] in turn caused by the mechanical act of freezing of [system-]water (this freezing mostly taken to be dehydratation of the protoplasm). In many frost-resistent plants, which often are subjected to freezing conditions but do not freeze to death, coldness is largely ineffective. As a result of a special structure, disruptions can largely be avoided (See also the special form of nerves at extension sites). True systems would, in this respect, be much less sensitive.