Formal ethics strongly distinguishes between rationally deliberating about what to do and rationally deliberating about what we ought to do.
Formal ethics strongly distinguishes between rationally deliberating about what to do and rationally deliberating about what we ought to do.
Formal ethics strongly distinguishes between rationally deliberating about what to do and rationally deliberating about what we ought to do.
This is because it uses "ought" to express an all-things-considered evaluation (one that takes account of all known facts). I can't rationally conclude that I ought to do A (in this sense) and yet not decide to do it.
On the other hand, I might conclude that there's no "ought" in a given situation -- that it's permissible for me to do A and also permissible for me not to do A. Then I might rationally decide to do A without accepting any ought judgment about A.