How do you know you’re a multiple system?

Since I didn’t get any responses at all with my last posts from earlier today, I’m just going to repost both posts in one nice item.

First, how do you know if you’re a multiple system? And why am I asking all of a sudden?

So I was just thinking a little bit ago, if I consider each of my genders as a different person, with the same base personality, but each is unique, with different tastes in music, clothing, accessories, etc., would I technically be considered a multiple system?

It’s just a theory, of course, since I don’t know all that much about how a system works.

But, even now, in girl mode, if I were to refer to guy mode, I wouldn’t refer to myself. I’d refer to him as if he were a separate person, as ‘Cart’, not ‘my male half’, though I’d do the latter more often than not to save confusion and explanations.

When I’m one gender, the other is always in the back of my mind, watching and waiting to be let out, sometimes commenting on something the other is doing, sometimes leading to arguments, both in my mind and out loud. They interact all the time, and I usually refer to them as opposite sex twins sharing a body.

Going with the multiple system thing again, after reading a few forum posts about being bigender, unlike many bigender people, I don’t feel like my genders are simply that, just two genders for one person. Cart and Kita (using different names than before, for my own privacy from a certain person), are different people. They have different personalities above my base, and have different behaviors, tastes, quirks, and everything. Cart is a leo and more wolf-like, and Kita is a virgo and more husky-like. Cart likes heavier music with deeper lyrics, Kita prefers lighter music and the lyrics don’t matter. Cart is more likely to do laser tag on a boring afternoon, while Kita would rather stay home and watch movies on the couch. Many bigender people do not have this sort of sharp distinctions between genders, they enjoy the same things no matter what they present as.

Also, Cart likes to cross-dress and Kita would rather stay in skirts and heels. They also have different body types, per se. Despite the actual body I have (female, chubby, big bust, small waist, large hips and thighs), Cart feels like he should have a male, muscular shape, and Kita should have a male, but feminine shaped body (think furry femboys).

Is this what it’s like to be a system, or am I over-thinking things again?