This is going to be a little long and a lot philosophical, but bear with me, y'all.
Lemme propose a little (actually very big) paradigm shift in how we talk about the validity and understanding of experiences, especially others' experiences.
So to understand exactly what I'm proposing, I'm going to start briefly with how it is now.
This is meant to be taken on a general nonhuman community level, just to be clear, and isn't meant to promote anti-science views or anything outside of the intended topic; this is a philosophical construct for the purpose of discussing philosophical topics of being other-than-human.
There's Reality, which is considered to be something you can prove that we all take part in whether we like it or not, and Experience, which is considered to take place in Reality, and yet be subjective to the one experiencing it and their interpretation. (Capital letters to set these concepts apart from the usual usage of the terms.) In Reality, you can Experience being nonhuman, but since you cannot prove in any way to anyone else that you really are nonhuman, you are, basically, at the whim of others' interpretations of your Experience, and Reality functionally does not include this Experience because of its unprovability.
Now this is a realist approach, and it's largely functional for most day to day purposes, but when it comes to philosophical Experiences that are absolutely true to us, even though they run directly counter to someone else's Experiences...you can, probably, see how the realist approach breaks down rapidly and engenders poor faith arguments over believability instead of conversation about substance.
This isn't just a nonhuman/Otherkin/therian/etc. thing either, I've watched the same devolution happen in pagan spheres, in witchcraft spheres, even in gender and orientation spheres...literally anywhere you have intense, internal, personal Experience as a basis for a community, this breakdown will happen. It's unavoidable with the current paradigm, which proposes a One True And Correct Reality, from which is derived judgement on whether or not any given Experience is acceptable or not.
I propose we throw the whole-ass paradigm in the dumpster and start again.
Instead of understanding there to be only one shared reality between all of us, and that some of us must therefore be mistaken with regards to how it works regardless of our own experiences, I propose that instead, we understand that (in the context of engaging with the unknown, anyway, this is meant to be philosophical and not anti-science as I said before) there is Consensus Reality, and Specific Reality. This is an idealistic philosophy, and I think it's potentially a lot more useful in how we approach comparing and contrasting being other-than-human.
Consensus Reality is what we generally live in...sort of. It's a vague average of all the individual Specific Realities that people actually experience. Consensus Reality is influenced by culture, religion, geographic location, politics, current events, history, and the lives and opinions of every person within it, though being an average of all of those things, any single person cannot really influence it meaningfully. It is important to note that Consensus Reality is still not Objective Reality, in the sense that even Consensus Reality will differ from place to place, time to time, and people to people. Objective Reality is essentially outside the scope of the discussion.
Specific Reality is the body of lived experiences, derived beliefs, and assigned meanings of each individual. It's influenced by Consensus Reality to some extent, but not governed entirely by it. One's Specific Reality does not necessarily encompass or agree with anyone else's Specific Reality (though of course multiple people can and do agree to share parts of their Specific Reality, all the time).
For example, my Specific Reality is that magic exists, that I can astral travel, and that when I do so, the body that I inhabit is fae. This is, for me, 100% true. Another person's Specific Reality is that there is no such thing as magic nor the astral nor fae, only God, God's powers, humans, and netherworldly powers that work against God which may pose as magic, astral beings, or fae to trick people. This is, for them, 100% true. Yet another's Specific Reality holds that there is no magic, there are no fae, there is no astral realm, and there is no God nor gods, nor any powers that work against them. For them this is also 100% true.
None of these Specific Realities are invalidated by each other, even though they directly contradict each other, because we are now discussing them in a paradigm in which none of them are more or less valid than any other given thing. In this paradigm, I can only really speak for my own Specific Reality.
The point of this paradigm shift is to encourage sharing information and ideas, rather than being correct, since there is now, technically, no 'correct' to even be. Even agreement with Consensus Reality isn't necessarily being correct. Consensus Reality is a useful tool as a statistical baseline, and a broad space in which it's generally good to be able to function, but it's not much other use to the conversation at hand. The closest concept to correctness that can exist is if the information from one Specific Reality is useful to someone else in their Specific Reality. If it is? Great, they've learned something. If it's not, there is no judgement or being wrong to assign; it just doesn't pertain, and that's fine.
Also, as I said before, there is no direct way that the average single entity can influence Consensus Reality, because Consensus Reality is nothing more than a statistical mean of all the individual Specific Realities in it. No one worldview can be considered the 'default' worldview, only the closest to average, and being closest to average doesn't confer any special meaning or correctness to it. However, unlike Consensus Reality, Specific Reality is infinitely malleable; an idea you share with someone could be the thing that makes things fit together or completely transform for them. Or vice versa!
ALSO, I've been thinking this way for a while, and I can tell people don't really grasp it because of the pushback I get every time I say "humans will always perceive you as a human because you cannot prove otherwise to them." This is not an insult, nor is it an invalidation. It's a factual statement on Consensus Reality, which says that the majority of the time, when a random human sees a random body who looks human, they expect that body to be inhabited by exactly one human mind. It also doesn't matter, because Consensus Reality doesn't get a vote on your own Specific Reality, which is in fact more real by virtue of it being an actually-lived experience and not a vague, statistical conglomerate of a bunch of other people's experiences, which itself has probably not been lived as-is by anyone. The point of the statement is, so what? Understand that people do in fact judge books by their covers, decide to not let this stop you, then do your thing anyway. Actively doing your thing is actually the best way any one person can change Consensus Reality, because by living your Specific Reality as openly as you're able, others may choose to adopt parts of it.
It's not enough to just say, "Ah, okay, I'll just talk about it like that instead," by the way. I'm not proposing a simple change in terminology (and if anyone does want to adopt it, uh, don't worry about keeping the capital letters, it gets to be a bit much to type). You really need to pull your assumptions about what's 'normal' and what's 'default' and what's 'real' up by the roots. Start engaging with other people's nonhuman narratives with the intent to understand them entirely on their own merits and no others, as that other person experienced them; not Consensus Reality's rules, not your own beliefs, nothing at all but their own Specific Reality. Only after that can you really start to grasp what it is and what it means to that person. To be completely clear, under an idealistic philosophy, If I believe I am a fae, and you don't believe fae exist, then I also believe that fae do not exist for you regardless of my beliefs, and you also believe that they do exist for me regardless of your beliefs. This is different than me saying, "Fae exist but this person cannot see them," which would prioritize my beliefs, and it's different than you saying, "Fae do not exist but Nevi does believe that he is one," which prioritizes your beliefs. Yes, you have to juggle holding what seem to be mutually-exclusive beliefs in your head until you get used to it. I swear it's a worthwhile thought exercise, though.
We mostly operate under a realist philosophy ("There is only one shared reality, which is Real Reality") when considering and discussing nonhuman stuff
I think we should shift our discussions, with awareness and intent, to an idealistic philosophy ("Everyone has their own reality, each one of which is Real Reality even though they conflict") in which nobody is correct or incorrect, because there IS no correct or incorrect to begin with
This would hopefully make sharing experiences a much bigger conversational focus and a much less daunting prospect
This would also hopefully lessen misunderstandings and incidences of people feeling talked down to or not believed, because it completely de-prioritizes belief as a whole