The "Illa" in Qiyas refers to:
Q1. The "Illa" in Qiyas refers to:
Answer: The effective cause or rationale shared between original and new case
Explanation: In Qiyas (analogical reasoning), the Illa (effective cause or ratio legis) is the shared characteristic between the original case (asl) and the new case (far') that justifies extending the ruling. For example, the Illa for prohibiting wine is intoxication, which extends the prohibition to all intoxicants.