This is a linkpost for https://atheistkit.wordpress.com/ethics/
I think it is perfectly obvious that this usage of "should" and so on is wrong. A paperclipper believes that it should make paperclips, and it means exactly the same thing by "should" that I do when I say I should not murder.
And when I say it is obvious, I mean it is obvious in the same way that it is obvious that you are using the word "hat" wrong if you use it for a coat.
I think you're using "should" to mean "feels compelled to do."
Yes, a paperclipper feels compelled to make paperclips, and a human feels compelled to make sentient beings happy.
But when we say "should," we don't just mean "whatever anyone feels compelled to do." We say "you might drug me to make me want to kill people, but I still shouldn't do it."
"Should" does not refer to compelling feelings, but rather to a certain set of states of beings that we value. To say we "still shouldn't kill peopl...