Mechanisms can't possess consciousness
No mechanism could consicously feel pleasure, success, grief, flattery, or any of the range of emotions and thoughts that humans experience due to their complex neuropysiology. No mechanism, then, can possess truly human consciousness.
No mechanism could feel (and not merely artificially signal, an easy contrivance) pleasure at its successes, grief when its valves fuse, be made miserable by its mistakes, be charmed by sex, be angy or depressed when it cannot get what it wants.
Geffrey Jefferson (1949, p. 1010).
Note: A similar argument from Jefferson is included in the "
Can computers have emotions?" arguments on Map 1.