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Again, learn once for all what "associativity" means!
Associativity is MANDATORY to be able to write something like i^4 = i*i*i*i.
For a non associative operator, i^4 means NOTHING.
For an associative operator,
i^4 = i*i*i*i = (i*i)*(i*i) = i*i^3 = (i^2)*i*i etc.
Then, if you assume i^2=-1 you MUST have i^4 = (i^2)^2 = (-1)^2 = 1
End of the story, and then you shut the fuck up forever on the subject.
Thanks
F.J.
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