[taos-glug] rant on terminology: "exponential" "modulo"

I don't get the terminology "exponential" in "exponential of a number modulo
another number", which is used when referring to the function "expmod" in
section 1.2.6.

What's actually being calculated is the remainder when _a_ taken to the nth
power is divided by _n_.

So, this is another case where we have to be very careful in reading
what the SICP authors are saying.   I don't see how "exponential" adds
anything to what is being said.   Furthermore, the terms "divides",
"congruent", "modulo," and "remainder" are all introduced and mixed up
together.   It's unnecessarily confusing, IMHO.

My advice:  stick to the code in this section.

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