If you look at the configuration space of a robot arm, it is a manifold. Does this manifold exist in the same sense as strings in string theory? Or do the strings in string theory exist in another sense? Does string theory raise new questions about which objects actually exist, and the different levels of physical existence? For example, how do spacetime and particles exist? And if we accept the holographic principle can everything exist on a boundary? But which description is the right one, or are both right and this is a duality that violates our intuition like the wave-particle duality?
For the purposes of this question you may assume string theory to be true, I am interested in philosophical approaches to understanding its ontology given holography and multiple dualities.