Atheism

[Amarok]

Optimal for what (or in whose opinion)? 

Depends on the biological function 

Why do you not think that the same reasoning would apply to my car?   

Nope invalid anology 

 Have you considered, that this argument is based on faulty reasoning and or assumptions?

Nope because it's not 

  This is not a very good argument against design or for evolution as is seen easily when applied to my car, or any other thing that we know is designed.    

That's just the point that you for refuting your argument for me . You can't compare them .

That and evidence shows that changes by chance are far more likely to cause dysfunction, than to create new functions.

And that does not refute my point