It is probably not a good idea to ask someone to expound a position they do not accept and do not feel they even fully understand.

I think that both Mill and Sidgwick are great and admirable philosophers, from whom we still have a lot to learn. I would not favor a form of Kantianism (if there is such a form) that treats Mill's or Sidgwick's moral philosophy with disrespect.

It is probably not a good idea to ask someone to expound a position they do not accept and do not feel they even fully understand.

Kant takes a free will to be a being or substance with the power to cause a state of the world (or a whole series of such states) spontaneously or from itself.

Descartes recommended that we distrust the senses and rely on the ... use of our intellect.

Our procedures of deliberation are not ways of finding out independent moral truths but instead ways of "constructing" these truths, in the process of deciding what to do.

The relation of the law to the self is only a helpful way of thinking about the law, that helps us better understand its validity for us.