“There are no moral qualities over and above the ones we can measure, either a) in the consequences of an act, or b) in the behavioural profiles or personality traits in people that reliably lead to certain acts. Both these things are physical (or, at least, material in the latter case), and therefore measurable.”
The parameters you measure are physical properties to which you assign moral significance. The parameters themselves are science, the assignment of moral significance is “not science” in the sense that it depends on the entity doing the assignment.
The problem with your breatharianism example is that the claim “you can eat nothing and stay alive” is objectively wrong but the claim “dying is bad” is a moral judgement and therefore subjective. That is, the only sense in which “dying is bad” is a true claim is by interpreting it as “I prefer that people won’t die.”
but the claim “dying is bad” is a moral judgement and therefore subjective. That is, the only sense in which “dying is bad” is a true claim is by interpreting it as “I prefer that people won’t die.”
Then by extension you have to say that medical science has no normative force. If it’s just subjective, then when medicine says you ought not to smoke if you want to avoid lung cancer, they’re completely unjustified when they say ought not to.
Yes, medical science has no normative force. The fact smoking leads to cancer is a claim about causal relationship between phenomena in the physical world. The fact cancer causes suffering and death is also such a relationship. The idea that suffering and death are evil is already a subjective preference (subjective not in the sense that it is undefined but in the sense that different people might have different preferences; almost all people prefer avoiding suffering and death but other preferences might have more variance).
Thanks for replying!
“There are no moral qualities over and above the ones we can measure, either a) in the consequences of an act, or b) in the behavioural profiles or personality traits in people that reliably lead to certain acts. Both these things are physical (or, at least, material in the latter case), and therefore measurable.”
The parameters you measure are physical properties to which you assign moral significance. The parameters themselves are science, the assignment of moral significance is “not science” in the sense that it depends on the entity doing the assignment.
The problem with your breatharianism example is that the claim “you can eat nothing and stay alive” is objectively wrong but the claim “dying is bad” is a moral judgement and therefore subjective. That is, the only sense in which “dying is bad” is a true claim is by interpreting it as “I prefer that people won’t die.”
Then by extension you have to say that medical science has no normative force. If it’s just subjective, then when medicine says you ought not to smoke if you want to avoid lung cancer, they’re completely unjustified when they say ought not to.
Yes, medical science has no normative force. The fact smoking leads to cancer is a claim about causal relationship between phenomena in the physical world. The fact cancer causes suffering and death is also such a relationship. The idea that suffering and death are evil is already a subjective preference (subjective not in the sense that it is undefined but in the sense that different people might have different preferences; almost all people prefer avoiding suffering and death but other preferences might have more variance).