[b_sharp]

The problem is in your choice of words. 'Anything can happen' is simply too broad to be accurate. It implies that evolution can get anywhere from anywhere which is simply not true. Because successful mutations generally affect a simple modification of existing genes and need to retain viability (cost is lower than or equal to benefit) some paths are not available.

[CharlesWayneCT]

That is true, the construct was overly broad (too simplistic I would argue) -- my point wasn't really about infinite possibilities so I didn't think of it that way until you mentioned it.