Prior to Umayyad Emirate, the Visigoths were focused on warfare, but lacked knowledge in science. In the Quran, Muslims are to have an endless curiosity and explore science. So, they tested their hypotheses, rather than utilizing theoretical reasoning to justify their theories.
Averroes (Ibn Rushd), Islamic Spanish physician and philosopher. An Engraving from the 1883 edition of Vies des Savants Illustres. (Courtesy of Encyclopædia Britannica)