Solipsism: do only you exist?

"One’s own mind is all that can be known to exist....
sum up the main ideas of solipsism. I’m presenting you with arguments of Gorgias of Leontini who is considered to be the father of solipsism.

1. Nothing exists
2. Even if something exists, nothing can be known about it
3. Even if something can be known about it, knowledge about it can't be communicated to others
4. Even if it can be communicated, it cannot be understood

Since it’s so difficult to prove these statements wrong most people reject them only because they feel they’re wrong (too learn more about perception of good and evil see the post about innatism); however, they still aren’t able to give any reason for rejecting solipsism. Probably you won’t be surprised that people who live in isolation for an extended period of time often question the reality of external world; sooner or later they will probably suffer from what is called solipsism syndrome (similar to depersonalization disorder); they will start believing that the world is nothing more than their minds’ creation… Isn't it frightening?"

Solipsism: do others exist in your mind only?

Solipsism ( i/ˈsɒlɨpsɪzəm/; from Latin solus, meaning "alone", and ipse, meaning "self") is the philosophical idea that only one's own mind is sure to exist. As an epistemological position, solipsism holds that knowledge of anything outside one's own mind is unsure. The external world and other minds cannot be known, and might not exist outside the mind. As a metaphysical position, solipsism goes further to the conclusion that the world and other minds do not exist. As such it is the only epistemological position that, by its own postulate, is both irrefutable and yet indefensible in the same manner.

Wikipedia 

Argument against Solipsism : Whether you are for, or against it Solipsism is still a neat topic to know about.

Solipsism: Finally Defeated