Technically it’s our brains using deductive reasoning subconsciously.
The way they work is information goes in from the 5 senses or from other mental faculties like your memory of things, and it calculates the information in logical fashion before it is processed as experiences and sensations. Once it has been processed into experiences and sensations, it is the in the “conscious strata” which is the one you are aware that stands apart from the “subconscious strata.”
Normally in people that have thoughts or distant voices etc, they have simply always thought of them as being figments of their imagination. In other words they were aware that there were calculations happening subconsciously that wound up being processed into experiences and sensations consciously.
Often people tend to make these out to be a supernatural phenomenon of one kind or another, and people have been doing this for thousands of years most of which have never understood how the mental faculties work in regard to each one’s informational logic and their “overlapping.” There is more confusion about these things than there is anything else in the world, and this is right between everyone’s ears.
I used to believe that those voices had to be other than me because of what they said, but I remember when I was young and socially challenging up on my life and my days that I would rely on what my brain was conjuring including voices and imagery such as visions of things I remember or imagine or simply visions of words I was needing in order to complete sentences as I was speaking to people. It was very rapid, and it was very helpful on the fly.
If you and I use the same logic that we have used a few times which is to imagine that these voices could not have known things if they were of our own brains, but somehow they did know those things…if we used this kind of logic for when I was a kid experiencing my mind the way I described above, then we would have to say that I was sourcing information not from my own brain but from outside of it.
Really I was just siphoning the logic capabilities that my mind had subconsciously on the fly as I was in the mix with other people socially. Back then I just assumed that I was smart or witty. Later in life as an scz I fell into the thinking that I was not smart but given the information I was aware of from telepathy, spirits, and the “universe spirit.”
In other words I fell into believing that my intelligence was not my own. This can be very self defeating and ultimately depressing to believe that you are only a fool on a string while being the host of higher intelligence making up your mind for you.