Al-Istiqra': Induction — From Particular Cases to Universal Rules

Induction — the opposite direction: The syllogism (Session 7) moved from universal to particular. Induction moves in the opposite direction — from observed particulars to a universal rule.

Al-Istiqra', defined: Both are essential, and they complement each other. Al-Istiqra', from S-T-Q-R-A meaning "to survey and examine", is the process of examining individual particular cases, observing a common quality in all of them, and deriving a universal rule that applies to all similar cases.

Three directions of reasoning: It is the primary method by which general principles are discovered. There are three directions of reasoning, compared on the slide.

• Qiyas (syllogism): universal → particular (deduction). It starts with a known universal rule and derives a specific case. Certainty flows downward from the general to the specific. Example: "Every human is mortal" (universal) → "Zayd is mortal" (particular). It is the source of certainty, but it needs a universal premise to begin.
• Istiqra' (induction): particular → universal. It starts with observed specific cases and derives a universal rule. Certainty flows upward from the specific to the general, with conditions. Example: "This crow is black, that crow is black, all observed crows are black" → "All crows are black" (universal rule). It is the source of universal premises — it provides the Kubra for future syllogisms.
• Tamthil (analogy): particular → particular. It moves from one specific case to another specific case based on a shared quality. No universal rule is explicitly stated. Example: "Wine is Haram because it intoxicates; beer also intoxicates, so beer is Haram." It is useful but not certain — covered in Topic 8.2. The Quranic call to Istiqra': The Quranic call to Istiqra' is Quran 88:17–20: "Do they not look at the camel — how it is created? And at the sky — how it is raised? And at the mountains — how they are set? And at the earth — how it is spread?" Allah commands observation of created things to derive the universal truth of the Creator's wisdom and power. This is Istiqra' — commanded by the Quran itself. The symbiosis of Istiqra' and Qiyas: Istiqra' discovers the Kubra (universal principle). Qiyas then applies the Kubra to specific cases. Without Istiqra', there are no universal premises. Without Qiyas, the universal premises produce no specific conclusions. They work together, not against each other.

Example

The doctor's Istiqra': A doctor examines ten patients with the same symptoms and the same cause, and concludes a general rule about the disease. That is Istiqra'.

Then the doctor applies Qiyas: Then the doctor meets an eleventh patient with those symptoms and applies the rule — that is Qiyas. Science and Fiqh both use both directions every day.

Key Terms

• Istiqra' (الاستقراء) — induction
• Qiyas (القیاس) — syllogism/deduction
• Tamthil (التمثیل) — analogy
• Yaqin (الیقین) — certainty
• Zann (الظن) — probability/conjecture

Quran or Hadith

Quran 88:17–20, translation as shown on the slide. — to be checked.

Fresh diagram to be drawn: Three-direction diagram: Qiyas (Universal → Particular, down arrow), Istiqra' (Particular → Universal, up arrow), Tamthil (Particular → Particular, sideways arrow). To be drawn in Project Desk colours.