Not infrequently in the Philosophy & Ethics forum posters imply that ethical systems should be based on some variant of logic. In other words, a set of logical axioms ought to be able to be applied to any human situation and produce a universally defensible correct ethical answer. The axioms must be universal, too.
This is pedantic silliness of the highest order.
Those who put forward any bases for ethics that are deemed not based on this illusive and imaginary "logic" are charged with being subjective and their views dismissed.
These views about logic and ethics, which are in fact subjective values in and of themselves, are intellectual silliness in the extreme.
First, those who deem that ethics be logically based should provide a logical rational for their position. Merely stating the view about logic and ethics is, in my view, insufficient. It's also, I suggest, intellectual cowardice.
Second, those who deem that any choice made about what ethics might be based upon is subjective and therefore lacking, must be able to argue logically why all choices are, therefore, not only subjective, but also why such choices are not credible or useful. That others might disagree with a choice is insufficient reason, it's only a matter of taste.
Third, those who argue for a logical based ethical system must first be able to offer some evidence that such a system, as they envision, might exist at all, but also why such a system has not been discovered in all human history. If such a system does not exist, what do these logical purists suggest those who make day-to-day decisions that affect their and others' lives base their ethical and moral decisions upon?
Fourth, it is a matter of fact, I submit, that logic and ethics are incompatible. Logic demands a level of precision and knowledge of variables not possible in human interactions and decision making. It's for that reason I suggest that those who expect there to be, or demand there be a logic-based ethical system are being silly. Those who condemn a moral decision or ethical paradigm as being subjective are, again, being silly, and indeed being subjective themselves.
Lastly, almost every aspect of a person's life is informed by subjective judgements based on incomplete, often false and constantly changing information and influences. Such is life. Those who think logic can be anything other than a marginally useful tool are delusional, and as I say are being silly.