Hidden in your reply is an assumption that a scientific and reproducible method cannot be applied to spiritual quest. Hypothesis, experimentation and inference

Hidden in your reply is an assumption that a scientific and reproducible method cannot be applied to spiritual quest. Hypothesis, experimentation and inference are basic steps in a scientific investigation but proving a hypothesis correct/wrong also depends on the instrument used e.g. if one doesn't use microscope one cannot directly show presence of bacterial cells. Similarly to prove that a state of thoughtlessness and beyond exists one cannot use the tools of thoughts, one has to observe by pure attention (without distracting thoughts) the state between 2 successive thoughts as a starting point.