The issue here is that the should question itself is mired with -undecidable- propositions. Fundamentally, the age seems to be tending towards viewing the human

The issue here is that the should question itself is mired with -undecidable- propositions. Fundamentally, the age seems to be tending towards viewing the human as a biological machine, yet unquestionably a majority of mankind believes in some variety of 'creature with a soul'. The 'should' question is trivially answered if you are in the mechanical camp. All sorts of 'difficult moral questions' go out the window. It is the preeminent slippery slope. And this is the root cause of the moral dilemma faced by the thinking set who are not in the mechanical camp.