If you could write them down--that is, if you had the words--then you've encountered them in some way. You may not have encountered the dragon before, in literature or reference, but you've encountered monsters, wings, and fire, and the imagination assembles the parts.
I hear what you're saying, but feel you are overlooking the fictional portion and thus negating it as
fiction.
You saying I've encountered them in some way, tells me you think what I dream about is possible, or possibly actual. If you disagree, then let me know why, cause it's the part where I feel you are overlook the crux of what you are conveying. But I write this paragraph after completing the entire response to this post, and would say that Darth Vader is possible because the character represents (or even is) parts of things that already exist (man and machine, or machine being used to supplement the physical parts of non-working physical human). And that's just the superficial literary portion of that character. Like saying the portion of the people you know as friends and loved ones is due to their physical makeup only. Nothing about their character, their non-physical traits that have you know/appreciate them, only the superficial. The cover of the book. Whereas I see Darth Vader as literally about the dark side coming to the surface, apparently taking over the being, while the good is clearly still within, awaiting its moment to overcome the dark, and bring peace not only to the individual, but to 'the entire galaxy.'
Not all representations are of something actual, but molecule models are.
I would dispute the molecules are actual. Perhaps a losing dispute (not sure), but would likely be similar to the debate on things perceived as 'not actually something.'
I'm not in disagreement, but I think it's getting away from the question I intended in the OP. The metaphor (the interpretation that associates images or symbols with something concrete and meaningful, non-literally) doesn't represent to me a possibility (actuality) of fiction.
One example might suffice to demonstrate what I mean by both fiction and actual:
When I speak of fiction, I think of truth value (true/false). When someone who approaches you tells you that there's a car crash around the corner, it can have no truth value until and unless it's verified by you in some way. You may immediately verify it, for instance, if you heard a loud boom from that direction, or if you know the person speaking to be crying wolf, then the 'value of truth' gets assigned to the statement (true or false). Before it has that value, though, it's a statement without that value. 'Fiction' is a word made to contrast with the circumstance of a statement that is actually (and incidentally) true--'fact'.
On one hand there is a fact about whether there's a car crash around the corner, and on the other hand you are presented with a statement. One hand ontology, the other epistemology. The one hand carries the burden of an actual truth, and on the other hand a 'truth value' will be assigned by you. If that value is 'true,' the statement will be held as equivalent to a fact, both hands equal--but if that value is 'false,' the statement will be dismissed as a fiction. Fiction lacks truth.
My question in the OP addresses those people claiming that anything is possible. To me, that says that everything is true, 'true' of the actual sort, because possibility speaks to what is actual (here and now) or might actually be (how we generally use the word 'possible'). Some things decidedly cannot be actual: lies (untruths), predictions (which paint the world that hasn't happened yet), estimates (which are meant to be vague), and fiction, which contrasts with fact.
Not everything is possible.
I feel this overlooks context. Perhaps intentionally, and likely without much need for further (philosophical, or spiritual) examination. And by context, I think of it as working on a few levels. Such that if someone in a night dream does all the things you have above, and I verify that that there was a car accident around the corner, does that mean the car crash is not fiction, not imagined? Likewise, if someone tells me the Death Star is blown up in Star Wars movie, and I verify that that as accurate, does this mean the Death Star is actual? I say these items, because you are asserting "fiction lacks truth" and yet, I'm pretty sure you are using truth in way that amounts to verification only.
Me, I wonder if we (or I) actually exist in a physical world. I perceive that I do, just like in night dreams. Those, upon waking, I take as unreal. The experiences still exist in memory, but I process them as unreal. Via spiritual exploration, understanding, and experience of (God's) Grace, I process the existence of physical world in much the same way, when contemplating or meditating. When caught up in the events and less than fully conscious, I process it as if this is 'really me' and this is 'really happening.' Which I do in night dreams as well. In many ways, I see no difference between the two, and how both are ultimately governed by a decision to accept Love (as myself and Reality all around me) or allow fear to be a 'reasonable' guide through life. I'd offer expression of my experience with Grace, which I (then) found put all things in proper perspective and which on hindsight I still think puts everything in 'physical' experience in proper perspective, but must also concede that I do not currently feel as filled with Grace as I did years ago. Yet, one key realization during that period was that Grace is always occurring and I do know that (and everyone does).
So, when you say not everything is possible, my tendency is to agree. But with 'existence' of illusions at work, it then becomes challenging to understand a bit, I think. Such that separation from God I understand to be impossible. Yet, we exist in a world where it is believe that not only are we possibly separated from God (who's over yonder for many) but that such a God doesn't even exist. Thus the inversion of truth has seemingly been made possible, but the question remains, has it? Has it really? Are we actually right now separate from God? Being the Gnostic Theist, I would say no, we are not and the truth is not actually inverse or undone. It is impossible to be separate from God, and there has not been any instance in human experience where separation has occurred. Perhaps imagined, but not actual.
It's a very real symbol, actualized in meaningful non-literal association.
While the symbol (representation) is possible, Darth Vader isn't.
This is word play, and where the earlier point comes into play: molecular models are a very real symbol, actualized in a meaningful non-literal association. While the symbol is possible, molecules are not.
No need (apparently) for further explanation for I just provided 'truth-value' with my positive claims, as have you.
When you say "literally" there, I look at the symbolism, not at the movie as some narrative of fact.
I see SW as a narrative of fact in much the same way I see atom models as representation of fact. Gotta bastardize the meaning of 'fact' in order for the rest to fall into place.