Duk da haka, Musulmi na iya koyon ilimomin kimiyya masu zurfi kamar sinadarai, ilimin lissafi, ilimin halittu, ilimin taurari, magani, masana'antu, noma, gudanarwa (kawai a ɓangarensa na fasaha), fasahar zamani, fasahar soja da sauran ilimomi da sana'o'i makamantan waɗannan, ko daga wani Musulmi ko daga wanda ba Musulmi ba. Sai dai ƙa'idar asali ita ce, idan al'ummar Musulmi ta kafu, ya kamata ta samar da ƙwararru a dukkan waɗannan fannoni da yawa, domin dukkan waɗannan ilimomi da sana'o'i wajibi ne a kan Musulmai a matsayin Fardul Kifaya (wato, ya zama akwai isassun mutane da suka ƙware a waɗannan ilimomi da sana'o'i don biyan buƙatun al'umma). Idan ba a samar da yanayi mai kyau wanda a ƙarƙashinsa waɗannan ilimomi da sana'o'i za su bunƙasa a cikin al'ummar Musulmi ba, to dukkan al'umma za a ɗauke ta da laifi; amma muddin ba a kai ga waɗannan sharuɗɗa ba, halal ne ga Musulmi ya koye su daga wani Musulmi ko wanda ba Musulmi ba, kuma ya samu gogewa a ƙarƙashin jagorancinsa, ba tare da wani bambanci na addini ba. Waɗannan su ne al'amuran da suke cikin Hadisin, "Ku ne kuka fi sanin al'amuran sana'o'inku." Waɗannan ilimomi ba su da alaƙa da ainihin ra'ayoyin Musulmi game da rayuwa, duniya, mutum, manufar halittarsa, nauyin da ke kansa, dangantakarsa da duniyar zahiri da da Mahalicci; haka kuma ba su da alaƙa da ƙa'idojin shari'a, dokoki da ƙa'idojin da ke tsara rayuwar daidaikun mutane da ƙungiyoyi, ba kuma su da alaƙa da ɗabi'u, halaye, al'adu, dabi'u, ka'idoji da ma'auni da ke yaɗuwa a cikin al'umma kuma suke ba ta siffa da tsari. Don haka babu wani haɗari cewa Musulmi, ta hanyar koyon waɗannan ilimomi daga wanda ba Musulmi ba, zai lalata imaninsa ko ya koma Jahiliyya.
However, a Muslim can go to a Muslim or to a non-Muslim to learn abstract sciences such as chemistry, physics, biology, astronomy, medicine, industry, agriculture, administration (limited to its technical aspects), technology, military arts and similar sciences and arts; although the fundamental principle is that when the Muslim community comes into existence it should provide experts in all these fields in abundance, as all these sciences and arts are a sufficient obligation (Fard al-Kifayah) on Muslims (that is to say, there ought to be a sufficient number of people who specialize in these various sciences and arts to satisfy the needs of the community). If a proper atmosphere is not provided under which these sciences and arts develop in a Muslim society, the whole society will be considered sinful; but as long as these conditions are not attained, it is permitted for a Muslim to learn them from a Muslim or a non-Muslim and to gain experience under his direction, without any distinction of religion. These are those affairs which are included in the Hadith, "You know best the affairs of your business". These sciences are not related to the basic concepts of a Muslim about life, the universe, man, the purpose of his creation, his responsibilities, his relationship with the physical world and with the Creator; these are also not related to the principles of law, the rules and regulations which order the lives of individuals and groups, nor are they related to morals, manners, traditions, habits, values and standards which prevail in the society and which give the society its shape and form. Thus there is no danger that a Muslim, by learning these sciences from a non- Muslim, will distort his belief or will return to Jahiliyyah.