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)]:

Eric Csapo on Levi-Strauss

The solution is never logical, strictly speaking, but it imitates logic. If the problem were capable of a purely logical solution, there would be no need to have recourse to myth. But myth can do what logic cannot, and so it serves as a kind of cultural trouble-shooter. Rather than thinking of it as a kind of placebo which creates the mere impression of solution to a problem, it may be regarded as a mechanism for relieving anxiety.
Csapo, Eric, 2005, ‘Theories of Mythology‘, p.226 (Blackwell Publishing)