^What does that creature love? Also, try not to fall into the trap of "if I can imagine it, then it's possible, and if I can't, then it's impossible". Popular position in philosophy, but an arrogant one.
I said
think of, not
imagine, and I believe that if something is concieveable, then it is possible (though I haven't got a very sophisticated notion of possibility, but whatever), but the converse is not the case. So that is my position, and if you think that is deeply flawed, then please provide a guideline for deciding what to believe
To give an example of such a creature:
If we accept a lockean conception of personal identity (which might be false, but few would claim that it is inconcievable that it could be the case), then imagine a chunk of person, P2, that is feeling love for someone or bliss (say after dropping some acid or MDMA). Now suppose that P2 has no recollection of life prior to this experience while the experience is going on, and suppose that when the experience ends P2 is killed (or the next chunk of person has no recollection of that prior state of being).
Now that would be a distinct person that never experienced anything but varying degrees of love/bliss. No prior feeling of hatred was needed.
Of course it is begging the question to use this as a proof that there is no necessary dual relationship between love/hate, all I wanted to establish is that it is not that far out to believe that there isn't. So it takes more than simply claiming that it is obvious that there is such a relationship, otherwise that too is begging the question.
(Okay, my example is a bit thin. For instance one could easily doubt that it is likely for a subject with
no recollection of prior life to just "zoom into existence" and feel love for another person. But we could turn it the other way around and assume that the P2 is terrified or feels anger or hatred - perhaps after realizing something (say, that the setting is experimental and that the person residing the body prior to P2 zooming in had donated the body to science and condemned P2 to zoom into this setting)
Anyways, I think that love and other emotions might depend on various things, but none of them are other "feelings", but perhaps combinations of brainstates and cognitive abilities. I dunno, it just feels weird to claim that one has to feel both sides of an emotionspectrum to feel any of the two emotions. It even sounds inconsistent.
kind regards, PMD