Right, but to be true to ourselves, we have to put this sentence on the spot. What I mean is, we must realize that when "we appear to be free", it is a false appearance, or at the very least does not reflect the truth. The objective truth must be distinguished from subjective appearances.Hence, even if by logic our lives are determined by causality, we appear to be free.
The contextual difference between noumena and phenomena seems to be used in this instance to obscure what is actually true, as a buffer for the discomfort of accepting the fact that we are not truly free. I respect that. I'd refer to Dennet again on this matter. I recently read a book of his entitled "Elbow Room; the varieties of free will worth wanting". It starts out accepting that we are in all likelihood not free as most people think we are, but then goes on to show that neither are we as robotic as the opposite of the concept suggests.