Where do the values come from- what part of you?
My values are completely emotional, coming from "the heart".
Are they backed up by reason, and if so what kind of reason?
Rarely, for me. I have this deep disgust for drugs, for example. Being a simple joint to an extreme Heroin, I have always had this hate for drugs and I know I will never use any of them. There's no reason at all, no concrete facts that support my preference, nothing, I just perceive them as terribly wrong with no factual backup.
Do you feel the need to back them up by reason or does that offend you? Are they purely subjective or purely relativistic?
Sometimes yes. The biggest problem is when I expose an important value of mine to someone, and this person keeps asking for a logical backup. That does offend me, because I can't provide it to the person, hence I start doubting myself. Aside from that, I feel like I have no reason to come up with logical facts to my values, unless, when, for some reason, I get in conflict of what should be really important to me and what should not. In these situations, I frequently ask myself what are the reasons and logical data for something I believe, and why should I keep believing in that.
Are things right only for you or are they right for everyone? Are things wrong only for you or for everyone?
It varies. Plenty of stuff that I strongly believe are universally well-received. Some other stuff are comepletely mine, and not as well received. Also, I have a little bit of values and beliefs that are seen as extremely wrong by everyone.
What happens when value/ethical systems clash?
That is a huge problem, it happens occasionally. As somebody else here said, the Fi is generated and built along the years. It is in constant formation, because every new experience we have are put into weight. When I experience something that goes so much against my values, I start to review them. And then it's the only time that I need to back up my values with concrete factual data provided by Te and the weak Si. When the new clashing value that I just experienced is more logical and concrete, and I can no longer defend my old belief, a little less than a week long process starts to update the whole value system. Also, frequently this process triggers some existencial doubts, that whole "who am I?" thing, and may get really tricky to solve and get over. It's not an easy process, and requires a lot of energy.
Do you argue or let them have their own point of view?
I rarely argue over values and beliefs. I learned as a child that it's important to me to keep my values to myself, and not express them frequently. Also, I have an incredibly hard time to put into words the stuff I believe. And, finally, speaking as an ENFP I guess, I don't like to argue with people.
Does it matter to you if other people agree with you?
Yes! Although I don't show my values a lot, I feel like my values are indeed right and worthy if people agrees with me.
Do ethical systems have to be logically organized?
I can't answer this for all users of Fi out there, but mine, at least, it's not. It's a complete mess. My Fi is really immature, maybe that's the reason.