But that’s silly, I don’t first have to prove that God exists to say that He is omnipotent, or a greatest conceivable being… . .]
You misunderstood what I meant. Since this is partially my fault because I didn’t do the best job of clearly stating my point, I’ll clarify.
My point is that if a being is defined as having certain characteristics, one cannot say that that being exists unless one demonstrates that a being with the characteristics in the definition exists.
To illustrate my point, lets say that John make up the word “blagu”, and define a “blagu” as a vehicle that can fly in the same place in the sky. Under this definition, helicopters would fit under the definition, so John could justifiably say that “blagus” exist. Now lets say Bob heard of John’s word “blagu”, which had not developed a universally accepted usage of definition yet, and he added “capable of flying to Mars” to its definitional characteristics. Even though John can justifiably claim that “blagus” exist, since he can demonstrate that there are things that meet the definitional requirements, Bob cannot justifiably say that “blagus” (in the sense he is using that word exists) unless he demonstrates that there is at least one entity that can fly in one place in the sky as well as fly to Mars.
Now to apply this to the word “god” with regard to the fine tuning argument. John may use the word “god” to mean “a conscious entity that created the universe”. For John to justifiably claim that a “god”, in the sense that he defines the word, exists, he must demonstrate that there is “a conscious entity that created the universe”. Now if a skeptic comes along and says “what designed god”, the typical thing for most theists to do is say something along the lines of “god is an undesigned being (by definition)”. If John does this, then he needs to demonstrate that “a conscious entity that is undesigned and created the universe” exists in order to justifiably say that a “god” exists. In other words, just like with the made up word “blagus”, if one includes more characteristics into something, more characteristics needs to be demonstrated for a thing that a words represents to be said to exist.
All of that may be a bit wordy, but to put it more succinctly, if one postulates some sort of conscious being that created the universe, as well as say that that being is simple (or has no parts) one would need to demonstrate that rather than just assert it.
No, I am afraid that it not what I have said. I have said that the claim “who designed the designer” if taken seriously and applied to other things would make coming to any conclusion impossible. The claim seeks us to prevent accepting an explanation of best, unless we have an explanation of that explanation. But by the same logic, we could not accept that explanation as best until we had an explanation of it. And so on.
The thing I think you misunderstood is that when people say “who designed the designer”, they are objecting to the the idea that it was designed by an
non-designed designer, which is claimed to be responsible for the existence of everything.
When I say that an arrowhead was designed, I’m
not asserting that it was designed by an non-designed designer, but merely that it was designed by some designer (regardless of whether the designer itself was designed). Whether the designer was designed, in the case of the arrowhead, is largely irrelevant.