Ah I've been looking for something in this to latch onto!
Glen -> "The word "epiphenomenon" is loaded with expectation/intention. It
works quite well in artificial systems where we can simply assume it was
designed for a purpose. But in "natural" systems (like the hyena case), if
we use that co
Variables are ... well, "things that vary". So in the language surrounding
iteration, I'm not saying "variable X occurs before Y". I'm saying X and Y take
on values *before* an iterate. And they take on values *after* an iterate. Then
ΔX and ΔY may be non-zero. I.e. x1, x2 ∈ X and y1, y2 ∈ Y and
