KNIGHT:"Upon the fact that rape, murder and kidnapping are by definition always wrong and therefore absolutely wrong! "
Unfortunately, you are quite mistaken by calling it a FACT. Its NOT a fact, but a definition. What you are saying is this: wrongfull killing is wrong. Well, duh. Now show that murder as you defined it exists objectively.
You can't because your definition includes the word "wrong". My question is: according to what standard must it be wrong?
www.dictionary.com "WRONG:
1) Not in conformity with fact or truth; incorrect or erroneous.
2) Contrary to conscience, morality, or law; immoral or wicked.
3) Unfair; unjust."
Now, number 1 can't be applied to killing because a killing is ALWAYS in conformity with fact or truth. Thus, we are left with definition 2. Of all things mentioned, only "contrary to law" can be established objectively.
For murder to be absolutely wrong, murder MUST ALWAYS EXIST REGARDLESS OF HUMAN, SOCIETY OR CIVILISATION. Unfortunately, the definition of "wrong" includes ONLY human, society or civilisation standards. Suppose there were NO laws. Would murder still exist? Not according to the definition. Thus, murder doesn't exist objectively but only subjectively. But how can something subjective claim to be ABSOLUTE? Quite simple: it can't.
Regardless of what tricks KNIGHT tries to pull by switching definitions, the ONLY way he can win is by demonstrating that there IS such a thing as an absolute standard of wrongness. So far, no luck.
Game over, please insert lots of coins.