Some people say that if there would be no God, then there would be no atheists. Therefore the existence of atheists is “evidence” (or maybe “proof”?) that God exists. Well, I deny the existence of invisible pink unicorns, therefore this lack of belief is “evidence” (or maybe “proof”?) that invisible pink unicorns exist. How easy it is to “prove” something. All we need to do is find someone who denies the existence of “it” (whatever “it” might be)… and voila! there is the proof…
I am very glad that you brought this up because it does highlight a difference between what Bradski contends to be the case and what ain’t necessarily so.
Take invisible pink unicorns. Anyone who denies their existence must have a very clear idea of what is meant when the phrase is used. It isn’t that they are disputing what invisible pink unicorns are, exactly. An invisible pink unicorn denier does not contend that the concept is hazy, unclear or “subjective.” The IPU denier merely holds that no invisible pink unicorns actually exist, because the concept is clear and just as clearly IPU is not represented among existent beings.
In fact, the IPU denier and the IPU contender MUST have the exact same reality in mind in order for them to actually have a valid dispute over the existence of the thing in question. The denier denies that any reality fitting the description of IPU actually exists, whereas the contender holds that the very same entity – invisible pink unicorns – actually do exist. Note, again, that they must be speaking of the very same entity in order to actually have a disagreement.
If one of them had in mind visible orange cats when they used the words
invisible pink unicorns, there wouldn’t really be a dispute, now would there?
Now let’s move to beauty.
An individual, like, say, Bradski, isn’t merely contending that beautiful things don’t exist, he is claiming the idea of beauty cannot even be consistently used among all users. That suggests everyone who uses the idea means different things, which is why a common ground CANNOT be found, not even in principle.
His claim is that the idea of beauty, even though it is used almost universally in common parlance, is not only not descriptive of real entities but also that no beautiful things can possibly exist because the idea is, in some, sense incoherent, or, at least, that it is not possible for individuals to be referring to the same concept of beauty since it can, in principle, have no objective referent. The question might be asked how that can be known and why it should be accepted without argument.
Simply put, the denier of the existence of objective beauty is – to use the analogy of invisible pink unicorns – not only contending invisible pink unicorns do not exist (beautiful things don’t really exist) but also insisting that the words “invisible pink unicorn” (beauty) means different things to different people because they cannot, in principle, be using the words in the same way.
Yet, the question still to be answered is how such a position is logically tenable. How would the beauty denier insist beautiful things don’t “really” exist at the same time as insisting that the concept of beauty means different things to different people, i.e., can ONLY be subjective, in principle.
It remains to be explained how an “invisible pink unicorn” denier could plausibly deny the existence of invisible pink uncorns all the while freely admitting that what he means by the words “invisible pink unicorns” isn’t anything like what anyone else means by those same words.
If the words “invisible pink unicorn” did not have a consistent referent then any dispute over the existence of IPUs could not be settled, not even in principle, until a common understanding was reached regarding which referent was actually being argued over.
This is where Bradski’s position gets sketchy. He waylays every attempt at discussing possible definitions of beauty by a circular argument. By insisting without compromise that beauty is “subjective,” Bradski simply hand waves off any attempt to arrive at a plausible accounting of beauty by insisting, “Well, that is your subjective view and since it isn’t accepted by everyone it does not qualify as objective. Heads I win. Tails you lose.”