I may understand what is the cause of your blockage. The problem with your debating style is that you keep repeating the same arguments and claims at nauseum in stead of trying to ascertain why the opponents won'taccept them. So the debate goes nowhere fast, which I imagine suits you well.
You seem to incorporate into the definition of morality that it requires ultimate, absolute, universal, fixed standard.
The abufistan argument :
When someone says that an absolute, universal, fixed standard is necessary, otherwise all one would have are preferences, one means that without these conditions being met, there would be no morality. The world we observe would appear the same and people may believe that certain behaviour is moral or immoral, but then they would be mistaken. Any behaviour would be amoral, just like preferences in taste or beauty are amoral.
I will take a leap of faith and assume that represents PGA2.0's position to move things along faster.
I will also assume that evolution by natural selection is real. If God is required for the existence of animals, then indeed, God would also be required for the existence of morality, at least on earth.
The abufistan argument is a bad one as long as there is no good definition for morality, as it is a difficult to grasp, abstract concept. The existence of abstract concepts, take for example numbers, are already hard to evaluate when they are clear. Hence to establish whether or not morality exists, we need a definition that allows us to make such assesment.
3RU7AL asked PGA2.0 for a definition in post 12. I have reasked a definition inpost 844 and finally we got one in post post 906. Not only is that gloriously late, but we got several definitions, while we need exactly one.
Here are the three provided in post 906, retrieved from Merriam-Webster's dictionary, that seem most relevant :
2a: a doctrine or system of moral conduct
the basic law which an adequate morality ought to state— Marjorie Grene
b: moralities plural: particular moral principles or rules of conduct
we were all brought up on one of these moralities— Psychiatry
3: conformity to ideals of right human conduct
admitted the expediency of the law but questioned its morality
morality today involves a responsible relationship toward the laws of the natural world— P.B. Sears
- Definitions 2a and b are problematic as they depend on the attribute 'moral', which is no clearer than 'morality'. Merriam-Webster defines that as function of 'right' and 'wrong'. 'Right' is defined as a function, of 'righteous', 'upright and 'appropriate'. Righteous is defined as function of 'divine law' or 'moral law'. Divine law is a poor base as a definition, as it would assume the existence of a god, while atheists also use the concept of morality in a non-religous context, and a god's existence is not an assumption in this debate. Moral law is useless as a base, as that would create a loop in the chain of definitions.
However, definition 2 is consistent with morality being or consisting of opinions. The problem is that that would refute the abufistan argument a priori.
- Definition 3 has the same problems, but is also consistent with morality being or consisting of opinions. E.g. what is appropriate is decided by society and thus (an amalgam of) opinion(s).
- Definition 4 relies on virtue, for which the most useful definition seems to be 'a beneficial quality or power of a thing'. If no ultimate, absolute, universal, fixed standard is required for something to be beneficial, then the abufistan argument easy to refute.
So, I have not found any definition for morality useful for the abufistan argument. Perhaps PGA2.0 can do better.
I will now defend the position that morality concerns opinions (but not all opinions), also known as subjective truths. (It is the first time I concoct this line of reasoning.) The key reason is :
Without a reference moral standard moral claims cannot be (dis)proven.
Demonstration:
A) Almost any true statement can in principle (i.e. with unlimited resources) be proven and any false statement can in principle be falsified. Exceptions are rare and to my knowledge only exist in mathematics and physics and reasons for the improvability can there be determined. That isto my knowledge not the case with moral claims.
However, theimprovability and unfalsifiability is typical for opinions. The only reason moral claims cannot be (dis)proven is their ambiguity or vagueness, i.e. their meaning is unclear (e.g. by missing a reference standard).
Vague qualitative claims without reference standards are opinions. Whether something is big, green, cold, cheerful or safe, without certain additional information, is is not a stament, but an opinion.
B) For claims with a moral standard : A moral standard is an opinion, by virtue of being chosen. One cannot choose without expressing the opinion that the choice is somehow appropriate.
Morality thus consists of a subset of opinions : those concerning the behaviour (conduct according to the dictionary) (including intentions) of agents. People can have opinions on the behaviour of agents without an ultimate, absolute, universal, fixed standard.
Hence, no ultimate, absolute, universal, fixed standard is necessary for morality.