Ah; I suspect the explanation for this second part is:
You do not consider a person capable of consent if they are depressed because of a temporary and curable imbalance in the brain/mind system (ie they are mentally ill*)
You do consider a person capable of consent if they are depressed because their life really is shit, and it's going to stay that way (ie. a rational cost-benefit analysis would tell them "yeah, actually, you are better off dead")
*edit: ie. they are non-consensually incapable of rationality
I would identify myself as holding many trans-humanist values and beliefs. That death and dying are not desirable and that it should, like smallpox, be eradicated. It also occurs to me however that I hold the belief that assisted suicide can sometimes be the right course of action. I can justify this sufficiently to myself, but I have a history of being a sophisticated arguer, so my ability to convince myself isn't great evidence.
Are my beliefs incoherent? I look at both issues and they both still feel right (I'm aware this does not make it so). Are these beliefs contradictory (and if so how)? Or are they justified by some hidden assumptions that I can't seem to acknowledge explicitly?
I get the idea that this is probably borderline appropriate for the discussion forum so I will delete this topic if asked to.