Painting taken from this site.
(1) Did I appear in the world, or did the world appear to me?
Maybe the following questions could be of some help here:
Did I appear in a dream(world), or did a dream(world) appear to me?
Who am “I”?
I will not answer the question (1), for my answer would be of no importance to any person who might read this post. This is the problem which is crucial here: the focal point of metaphysical reflections.
I will only say that all kinds of experiments, so all the sciences, are pretty useless for the one who tries to solve this dilemma.