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islamic-usulWe're still mapping where this idea was first discussed. Key passages and related ideas below.

ʿAql (Reason as a Source, Shīʿī)

Reason treated as the fourth formal source of law in Twelver Shīʿī jurisprudence, replacing Sunnī qiyās.

Reason treated as the fourth formal source of law in Twelver Shīʿī jurisprudence, replacing Sunnī qiyās.

Key passages(20)

Nihayat Wusul · al-'Allama al-Hilli

Very high
Fadaih 264challenges

Fadaih · al-Ghazali

Very high

Mustasfa · al-Ghazali

Very high

Radd Cala Kindi · Ibn Hazm

Very high

Sharh Talwih · al-Taftazani

Very high

Daw Bahir · Ibn Qudama

Very high

Ihkam Fi Usul Ahkam · Ibn Hazm

Very high

Majmuc Fatawa · Ibn Taymiyya

Very high

Musawwada Fi Usul Fiqh · Ibn Taymiyya

Very high

Risala Sacdiyya · al-'Allama al-Hilli

Very high

Sawaciq Mursala · Ibn Qayyim al-Jawziyya

Very high

Talkhis Fi Usul Fiqh · Imam al-Haramayn al-Juwayni

Very high

Tibr Masbuk · al-Ghazali

Very high

Bab Hadi Cashar · al-'Allama al-Hilli

High

HaEmunot veHaDeot · Saadia Gaon · 922 CE

High

ונאמר כי ידיעת הנראה הוא מה שישיגהו האדם באחד מן החמשה חושים, אם בראות או בשמע או בריח או במשוש או בטעם. אבל מדע השכל הוא אשר יעלה בשכל, כמו שהצדק טוב והכזב מגונה. אך מדע ההכרחית הוא מה שאם לא יאמין ב

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Arbacin Fi Usul Din · Fakhr al-Din al-Razi

High

Dar Tacarud · Ibn Taymiyya

High

Fisal Fi Milal · Ibn Hazm

High

Fusul Mukhtara · al-Mufid

High

Ihya Culum Din · al-Ghazali

High