non sequitur. Why does beauty imply the existence of an intelligent designer?
Like a Saturn V rocket, or an AC induction motor.
Things that make you proud to be an engineer.
Maybe whatever created these gears was being tortured by an evil master until it made something satisfactory.
I really can't say for sure...
Mind you, I'm an atheist, so this is just my understanding of the argument.
Looks like this for is as in "because", he is telling you why he belives, because of "beauty like this". You can only say you do not believe this evidence implicates that.