Fiqh al-Qiyas al-Jali — Evident Analogy in Islamic Legal Reasoning: When the Basis for Extension Is So Clear That No Jurist Can Reasonably Dispute It

The Structure of Qiyas Jali

For qiyas to be jali (evident), the following must be clear:

1. The original ruling (hukm al-asl): what the text explicitly prohibits or commands
2. The original ‘illa (‘illa al-asl): the rationale underlying the ruling — so clear that no serious jurist disputes it
3. The far’ (far’): the new case not directly addressed by the text
4. The identical or greater ‘illa in the far’: the new case has the same or stronger version of the rationale

When all four are clear, the analogy is jali and its conclusion carries near-textual weight.

A Fortiori (Qiyas al-Awla)

The strongest form of jali qiyas is qiyas al-awla (analogy by the greater cause) — also called mafhum al-muwafaqa in some schools. If the minor case is ruled a certain way, the major case is ruled the same way a fortiori (with even greater reason).

Examples:

• If saying “uff” to parents is forbidden, striking them is forbidden with greater reason
• If a small amount of alcohol is forbidden, a large amount is forbidden with greater reason
• If wasting an orphan’s property is forbidden, stealing it is forbidden with greater reason

Contrast with Qiyas Khafi

Qiyas khafi (hidden analogy) is where the ‘illa connection between the original and analogized case is not immediately apparent and requires scholarly reasoning to establish. Qiyas khafi is where legal schools diverge — what one school sees as an evident ‘illa connection, another may dispute entirely.

See also: Ilm Al Usul, Fiqh Al Wasatiyyah, Fiqh Al Darura, Fiqh Al Hiyal, Fiqh Adl Wa Ihsan