Arabic culture, of course, also made a lasting impact on Sephardic cultural development. General re-evaluation of scripture was prompted by Muslim anti-Jewish polemics and the spread of rationalism, as well as the anti-Rabbanite polemics of Karaites. The cultural and intellectual achievements of the Arabs, and much of the scientific and philosophical speculation of Ancient Greek culture, which had been best preserved by Arab scholars, was made available to the educated Jew. The meticulous regard the Arabs had for grammar and style also had the effect of stimulating an interest in philological matters in general among Jews. Arabic became the main language of Sephardic science, philosophy, and everyday business, as had been the case with Babylonian "geonim". This thorough adoption of the Arabic language also greatly facilitated the assimilation of Jews into Moorish culture, and Jewish activity in a variety of professions, including medicine, commerce, finance, and agriculture increased.