i was actually thinking that the "of" was superfluous.
since reading [0] on hn (discussion: [1]) i am more and more seeing the use of "because" without preposition. so i was expecting
"Q. Why can't it be given more than two alternates for one position to encode more information?
A. Because math. See Explanation.txt for a bit more detail."
The use of the word "math" (and "science") seems to be changing as well, I think this usage is an example of an unconventional use of the word "math"( rather than an example of the new use of "because"*.