What is reality? Really!!
We perceive the surroundings through our senses, so what we consider reality is what our senses let us perceive. If the senses are fooled with wrong, different than actual information, then we get the wrong concept of reality. We could be in a completely different place and a completely different situation of what reality really is.
Take for instance, two people standing in the outdoors; for one the ambient temperature could be nice and fresh, while for the other it is cold and freezing! Both perceive the ambient temperature through their senses. Both perceive the same temperature, yet their brains interpret it in a different way, so for one reality is a cold day, while for the other reality is a fresh and nice day. They both are living in a different reality!
So from that point of view, reality is what we perceive, and there are as many realities as people exist. Yet it is considered that we all live in the same reality. I know that first hand when trying to interact with people while being an Aspie. My reality, I know, is completely different than theirs, and what we see and perceive is not the same.
But people, by considering reality is the same for everyone, expect others to respond to their inputs with reactions according to what their own reactions would be, forgetting that if others have different reaction of what they expect, it is due to be living in a different reality, and not to personal behaviors, yet they still form a wrong perception of the other person.
An example; a person expect others to respond to a situation the same way they respond, yet get mad at someone who seems to be indifferent to the problems at hand, and even worry about other problems that for the first person seem just irrelevant at the time.
So we live in different realities, and while for normal people (Humans) the differences between them are, or could be, just minute, compared with an Aspie such differences can be huge.
So often I see polemic about alien beings coming from another dimension, and how terrifying that can become for most people; yet in my personal perception (thus opinion) just among those born and living together different dimensions do exist, and act as barriers for communication and understanding by the persistent concept in most people that we all must live in the same reality or dimension.
Just a thought