You haven't solved the epistemological problem in solipsism and the problem of the-thing-in-itself. How you know something independent of your mind, if you only know through your mind?
So here it is, step by step. If you doubt everything, you know one thing: That you doubt! You know that something is going on. Namely you are a mind with experiences. If you then test your experiences further, you notice that the experiences are not yours. They come to you. They are caused by something else.
So here is the problem: You are caused by something else and that doesn't have to fair. You could be a computer simulation run by an Alien space race in a universe that is nothing like it appears to you.
So the problem of the real world is two-fold. You know nothing of the real world and it is a belief that the universe is fair and nothing something else than it appears to you.
Now here is a news flash for you. That is how you explain this:
Philosophy of science
That is why science is based on beliefs, that you can't test. You can't test if the universe is fair and that you can trust your experiences. That you as an apparent member of the Western culture are unaware of your own culture's intellectual history and how philosophy led to science as a naturalistic belief system, is not my problem.
So if we agree that we both trust our experiences, from that doesn't follow that the world is real. Only that we both trust our experiences. If we then try to categorize our experiences, you then find this:
https://undsci.berkeley.edu/article/0_0_0/whatisscience_12
So here is a model of your experiences:
- You have physical experiences.
- You have abstract rational experiences.
- You have social experiences.
- You have personal subjective experiences.
- You have an experience of making sense of it, a world view.
You believe that your experience of a real world is knowledge. It is not. It is a belief system that apparently works.
How? Because you haven't solved the epistemological problem in solipsism and the problem of the-thing-in-itself.
Now I am serious. If you have solved these 2 problems, please write down the explanation and publish it. You would then have done something no other human have done in recorded history.