>>17860937 (OP)It seems obvious that it is wrong to torture and rape people for fun.
>"But we can't detect the property of wrongness"It is far more obvious that it is in fact wrong to torture and rape people than that every real property has to be empirically detectable. Any argument for this claim will have premises way less plausible than the claim it is trying to deny.
>"But moral properties are really queer"The world is weird. People used to think gravity was a spooky occult force that couldn't possibly exist. The fact that some philosophers are incredulous about morality is not a reason to deny that torture and rape are bad.