I look around. I see the world. However I can do that in my dreams. In my dreams I can fly - sometimes.
Is there any way of using mathematics or logic to prove to myself that anything exists except me? (cogito ergo sum).
Has knowledge progressed in any way since Descartes made his famous remark, that can convince me there is a real world out there?
In response to comments that this is not a world building question, or more suited to philosophy I will say the following:
- Clearly this is the ultimate Worldbuilding question.
In lucid dreaming, it is possible to do miraculous things like flying or even destroying mountains. If I am dreaming the world, I should in theory be able to build or rebuild it any way I want. If someone can show that I am not dreaming it, then there is no point in my embarking on this endeavour.
- There is a philosophy tag in Worldbuilding. I might as well use it.
I am aware that the concept of solipsism is not new. I am asking the considerable brain-power of this site for a reason that solipsism is not valid.