Maybe you will find out why one day.
Gee, isn’t that a convenient way of getting out of the responsibility that you have to defend your position!
You have every rational reason to believe…
Any neuroscientist can explain to you why dualism is a dubious position. By your logic, my body can’t be a male human body just because it is not composed entirely of “male” cells. Chemical reactions in the brain do produce thoughts. That is a fact, and I am sorry that you are too blinded by your speciesist hubris to accept it.
I see you like that idea…
You don’t have to. That blue elephant that I may imagine in my thoughts doesn’t exist, but the chemicals that cause imaginative thought do exist, and I perceive those thoughts in my “mind” as a blue elephant. Just because you (or no other person) don’t understand how exactly naturalism can account for thought, it doesn’t mean anyone has any reason to think that there is an immaterial aspect to the mind. Time and time again, science is revealing the human mind to be nothing more than the product of chemical reactions. For instance, injuries to certain areas of the brain will prevent the injured person from accessing certain memories or thoughts, because those thoughts do not exist anymore. They require a functioning brain.
You show me a human without a brain who can think, and I’ll show you a blue elephant in a brain.
Assertions don’t count as rational arguments.
I can’t tell you how many times that thought crosses my mind as I debate Catholics!
I am not pretending. Ever heard of Daniel Dennet or Sam Harris? They are more than just spokesmen for “new atheism”; they are neuroscientists.
First, accepting the existence…
That is false for the same reason that it would be false to assert that there are no objectively good strategies for winning a game of chess just because there may not be any “absolute objective beings” to state such strategies. Morality is only meaningful as a concept insofar as it is a means to a certain end. Moral facts do not have to be as objective as mathematical facts to be considered binding on humans.
Its a subjective moral system based on desires; whether collective or otherwise. It has nothing to do with the existence of an objective moral standard or objective moral truth.
You still have provided no decent reason for me to consider Catholic morality an objective moral system, so I have no standard to go on that would tell me what you consider an objective moral system. An objective moral system is one that is true regardless of the opinions or preferences of any sentient beings, and desire utilitarianism is such a system. Regardless of whether I think murder is right or wrong, it is an objective fact that all people have desires-as-ends and desires-as-means that they want fulfilled and that motivate them do certain actions. The entire philosophy stems from that fact.
For
any moral system, some subjectivity is required. In the Catholic system’s case, the subjective basis is God’s moral preferences and nature. God could have had any nature and any preferences possible. If he couldn’t, then that would imply that some greater being gave God his attributes for a specific reason. How else could God’s only - literally,
only - attitude toward homosexual acts be negative?
Essentially, God’s nature is arbitrary, therefore morality is completely meaningless if God is the basis for it.