old title: Does a second you in your brain gives you an advantage?
Let's say you've talked enough to yourself to develop in your mind a "second you" (Not a second personality, it's more like if your reflect in the mirror suddenly went independent - at least psychologically). He evolves with you, and his personality do not diverge from yours - every time he talks, you figure out you would have said the same thing if you had answered. But still, there is a separation, like the one which physically exists between you and you're friend. A good metaphor would be : you're head is a computer, which launch twice the same program, and make them discuss together.
How could you deal with it? Some more precise questions to guide your thoughts:
1) Survival reflexes to adopt, to not become crazy.
2) How to resist to constantly talking with him, and to keep doing other things?
3) What is the interest to have other friends, now that you've got the perfect one in your head?
4) At the end, when you are accustomed, does it give you a decisive advantage in life?
(The answers to theses questions will help me build a world at a macro-level, but i want you to keep concentrated on a micro-scale. Please excuse also my English, I'm sadly an exact caricature of the French guy, naturally not equipped to talk correctly any foreign language)
Let's precise some points.
The idea is not to have a second personality, I think I wasn't clear enough on this (maybe because this wasn't clear enough in my own mind).
It's easy to play chess against yourself. You just have to change your place, and to figure out what would be the best choice for your opponent in his situation. However, you don't do that, because you know exactly what the other player has in mind, and it is finally mentally exhausting. But, still, it's feasible.
By analogy, it is technically possible to have a dialog with yourself. You can speak, change place, and answer. Usually, you don't do this, because you figure out what the answers on a depth 2 or 3 will be, and it's mentally exhausting to dig further. But with enough motivation, you can do this.
However, doing the same thing with a friend, for obscure reason, doesn't require the same amount of energy. You can talk with them during hours, or do with several chess play in a row. Why?
Don't know. But imagine that your subconscious mind was able to think (exactly like you would do), and to provide you, without conscious effort this answer/chess move (after, eventually, a thinking time). Let us not concentrating about the practical feasibility (no brain-calculus), the mechanism is already there.
Let's say that this ability can theoretically only be consciously used. But.. But it can maybe become addictive, like a permanent link to pr0n sites whenever you're on the internet.
What I want is a list of examples of situations, where this ability is an advantage/disadvantage, and your final conclusion (at the end of the day, is it more positive or negative?)
(What your unconscious can do is not just converse, or play chess, it's all what you're normally able to do. But if you become lazy because you let him do everything, he will become lazy just like you)
What is considered as advantage/disadvantage ?
Advantages : The ability will be considered as positive if you can show that
- A person with this ability can rise the social ladder faster
- They are happier in their life, because their personality is more balanced and harmonious. That is to say, they are less likely not to be resilient after an eventual trauma.
Disadvantages : The ability will be considered as negative if :
- You spend your whole time just interacting with yourself, and stop doing things like cleaning your room. (because at the end of the day you will realize that you have become a lazy piece of s* and you will be very sad)
- It increase significantly your chances of dying because of inattention (ex : you're outside talking with yourself and get hit by a car you haven't seen)
- You finally feel alone, because you are the only one with this ability, and no one understand you.
What am I waiting for in the answers ?
The best answer will be the one who presents the most exhaustive list of the argumented advantage/disadvantages you can find. What really interest me is a list of all the realistic psychological reactions which could affect someone with this ability. So I don't want too exotic cases : (not considering a super lazy person, or a psychopath). Just some lambda user of WorldBuildings. I have to feel that what you present can really happen. I also removed the tag "biology" because i want you to keep concentrating on the psychological part of the problem