It's because randomness is
defined by probability and calling something "non-random" that you then go onto describe by probabilities (whether increased or decreased) is a contradiction in terms. Furthermore, your and articulett's insistence that something where the outcomes are are limited non-random is completely absurd because it eliminates some very common and important probability distributions both
discrete with infinite support (e.g., the
Boltzmann and the
Poisson)
continuous with support on a bounded interval and (e.g., the
normal and the
Student's t).
I'm afraid that you're missing the point. We have the technical definition of random. I don't think anyone has a problem with folks using that technical definition. When you use it, however, you need to be clear what you are doing.
We have mutation. Mutation clearly fits the technical definition of random (and what this really means is that we have limited knowledge of the inputs, so it isn't some grandiose ontological category; it isn't a "fundamental" concept).
Then we have selection. Selection can be just as random in its inputs as it wants to be, but what selection is
in its function is a limit to the probabilities out there. In the die analogy it is akin to loading the die to make a six come up every time (within reason, as there are always other possibilities given extreme circumstances). In nature, creatures who are adapted to their environment tend to survive and reproduce -- that is what adaptation means. Selection loads the die. It limits the possibilities (the probabilities). It doesn't matter that the process is potentially random. Of course it can be random. It can be determined. What difference does it make? As mentioned above, a comet hitting the earth is viewed as random. But we do not speak of the function (limiting the possibilities) as random whether or not what actually serves as the selecting force is random or not. That is simply the way we use language.
That is the whole point of this argument. You seem to look only at the cause for a selecting force, see randomness in it (in its cause or occurrence) and call the whole thing random (completely neglecting its function). But it doesn't matter a whit if that force is random, designed, or the whim of Zeus. Selection is a shaping force
because it limits the probabilities.
If you want to go around saying the whole process is random, knock yourself out. But that gives the wrong impression. It tells only part of the story because words do not serve merely technical functions. They carry with them connotations working within the larger language game.
If calling evolution random is your thing, then go to it, I don't really care. If you haven't noticed I'm all for Wayne educating the world about the technical definition of "random".
If you actually care about the ideas, though, you should be willing to see this and to communicate the nuances. Calling the process "random" unqualified, if that is what you are arguing, is a misrepresentation because we do not call things that limit probabilities random processes, even if they are instituted by random means.