The problem of solipsism is unfortunately meaningless. Even if you can't prove that other consciousness exists, are you going to change anything in your life due to this fact? Try this. If you have a problem with the doubt that other minds exist, I want you to get up tomorrow morning and go to school or work or church or where ever. However, I want you to go completely naked. If it's possible that other minds don't actually exist, then it doesn't matter, right? Though I am quite certain nobody would actually do this. This skeptical possibility is not relevant. The way I see it, I agree, we can't know certain topics like this. But so what? It has no effect on anything else except for the thought experiment itself.
The distance between insanity and genius is measured only by success.