To really define what a tulpa is, you need to define what a human is and what it means to be conscious as well as exist. However, defining those things are
impossible without your own subjective thoughts on the matter. You might believe you're conscious, but someone else could disagree and you couldn't say anything about it due to
not having any solid evidence of your consciousness.
So, for the purpose of defining a tulpa, we'll define what it means to exist, be conscious, and have a sense of self as
all the same thing; the combination of your memories, experiences, opinions, and feelings. All these things are also what make up your mind, which is essentially the software that runs on the hardware of your brain.
With the difference between mind and brain in place, defining tulpas is easy. A tulpa is an entity that exists inside a human's brain, has their own sense of self, and is believed to have a conscious which is separate from the main human (or host). The tulpa and host are two different minds living inside the brain they inhabit. Basically brain roommates.
Tulpas have their own opinions, feelings, and thoughts. They're just using the brain to process
information (just like their host is). It's also possible for multiple tulpas to exist within one brain.
