Istihsan

Istiḥsān (Arabic: استحسان) is an Arabic term for juristic discretion, meaning 'to consider something good.' It is a principle of legal thought underlying scholarly interpretation (ijtihad) in Islamic law, used by Muslim scholars to express preference for particular judgments over other possibilities. The Hanafi school of jurisprudence adopted it as a secondary source, though disputes existed among classical jurists over its validity.

The term derives from the root al-husn, meaning "good," the opposite of al-qubh ("bad"). Linguistically, it conveys decorating, improving, or considering something good, as well as personal inclination toward a preference even if others disapprove. Technically, jurists defined it in varied ways: Bazdawi described it as moving from one analogy to a stronger one; Al-Halwani saw it as setting aside an analogy for stronger evidence from the Quran, Sunnah, or consensus (ijma); the Maliki jurist Abu Bakr Ibn al-Arabi defined it as sacrificing some implications of evidence by way of exception; and Al-Karkhi characterized it as deciding a case differently from similar precedents due to a stronger reason requiring departure. Jurists categorized istihsan into types based on textual evidence (nass), consensus (ijma), customary good (ma'ruf), necessity (darurah), benefit (maslahah), and analogy (qiyas).

Criticisms

Classical examples include Abu Hanifah’s ruling that one who eats forgetfully while fasting should repeat the fast, but he set this aside based on a narration allowing the fast to stand; allowing manufacturing contracts with advance payment despite analogy prohibiting them, due to consensus; and permitting use of well water contaminated by dirt or carcasses after formal cleaning, based on necessity overriding strict analogy. Critics like Al-Shafi'i viewed juristic preference as heretical, usurping God’s sole right as legislator, though some argue his criticism targeted the term’s linguistic meaning rather than its technical sense; modern scholarship sees it as a direct technical critique. Malik ibn Anas reportedly changed his opinion on binding divorce, warning a disciple not to record it because his view could shift before nightfall.