That is cute, but wrong. Data is gained from measurement, not conclusion. Without data gathering, from experiment, the rest of the method is worthless. Observation is a beginning. Study is to gain background to create a hypothesis. experiment is the crucial bit, and without it there can be no conclusion as to the validity of the hypothesis. Please go back and study Descartes again.
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Natural philosophy is what became physics. Forget Descartes, go look up what words mean, then learn philosophy, the Trivium, and the scientific method.
Is that a serious question? If so, see the previous comment.