Does any hypothesis require experimental verification?

Any hypothesis requires experimental verification. For example, the theory of relativity has many contradictions and non-provable postulates. Without experiment, a theory is a mental description of a phenomenon or process. Only experimentally can the correctness of the mental model and the correctness of the conclusions drawn be established. Not all hypotheses hold up to this test. Many postulates were ahead of their time and only in our days find evidence and are confirmed by experiments.