Most of what we "know" to be "real" is still continuously being proven wrong;whether it is science or our own perceptions, there are countless examples. We see the world as "we are" and not for "what it is" including other people and inanimate objects. Hence, putting a condition on fear based on our own faulty perception of what is real is still a question to me. What is real, is how we seem to perceive and experience (assuming we are not mystics who can see reality for what it is). Hence, if our notion of reality itself is constantly evolving why worry about what is real, hence why worry about fear at all. Accept fear when it arises, for within it lies truth of some experience that is about to unfold and reveal your truth, but do not buy into it- many of those emanate from our mind and are made of illusions and arise out of impermanence. When we accept the fact that it is ok to be fearful but not act out of it, we are forever free from the need to qualify what is real and what isn't.