Human Agency

Tetrad telling a story
Seems to be a parlor game: You have that "aha" moment
Let's try to formalize the tetrad
Maybe "empowers" rather than "enhances"
the relationship between a and b that technology reveals
if true that tetrad= canonical formula reveals something fundamental about human consciousness: tretrad reveals human agency in technology impact and implies that we can control if we understand it.
Levinson remediation
Purpose of myth is to reconcile incompatibilities; purpose of tetrad is to reconcile technological incomoatibilities, that is, to reconcile incomoatible human activities under the influence of technology
Technology doesn't "act." The tetrad assumes human agency. Instead of the concrete actor of a mythic tale, McLuhan gives us the abstract "actor" embodied in a particular technology. But, excluding artificial intelligence, only humans can be actors.
When there isn't a human actor/agency (Technological: Terminator, Matrix; Natural: vampires, zombies.) always a dystopia)
Luckas analogy variation of CF
enhances "a" obsolesces "b"
fx(a) = enhances
fy(b) = obsolesces
[f(x)(d1,h1)] : [f(y)(d2,h1)]: