[dreen]

There absolutely are provable results, you make observations, conslusions, you must show how those are linked with logic. "Is X ethical" is just one of milions of possible questions in the class of sciences called humanities, of which ethics are just a small subset. However, when doing any research including interacting with live humans, you must understably prove ethical conduct.

[LatteLazy]

So is X ethical? Can you give me the cold hard proof that smoking is moral (or that it is not)? What about paying taxes that will be used to build hospitals but also to bomb people?

Remember, not an opinion or an argument, a cold hard, proof no one can argue with.