Al-Qiyas Analogical Deduction) In Islamic Jurisprudence

Concise Introduction to Principles of Islamic Jurisprudence Based on al-Waraqat [Part 24]

(Al-Qiyas)Analogical Deduction 

Literally, ‘qiyas’ means measuring, estimation, and assessment. 

Technically, making the rule of the new case the same as the original case because of the presence of a common ‘effective’ cause between them.

Pillars of al-Qiyas

1. Asl (the origin case).

2. Far’ (the new case).

3. Illa (effective cause). 

4. The rule, that the new case will have, which is the same as the original case because of the presence of an effective cause between both of them.

Example for al-Qiyas 

1. Asl: Gold and silver.

2. Far’: Paper currencies.

3. Illa: Both of them have value and can be priced. 

4. The rule: Zakat is obligatory on par currencies. 

Concise Introduction to Principles of Islamic Jurisprudence Based on al-Waraqat By Imam al-Harmayn [Part 16]

English translation, and newfangled commentary on Imām al‑Ḥaramayn al‑Juwaynī’s Kitāb al‑Waraqāt fī uṣūl al‑fiqh

Imam al-Juwayni