Branch of philosophy

Philosophy of science

What is science, and what can it tell us?

A test of your criteria

Is this science?

Pick a claim and decide whether it qualifies as science.

The core

Science is the most powerful method of inquiry human beings have ever developed. It has eradicated diseases, mapped the genome, split the atom, and sent instruments beyond the solar system. But what is it? What makes an investigation scientific rather than merely systematic? What separates genuine science from activities that look like science but are not? These are the questions philosophy of science asks — and they are far harder than they appear.

The demarcation problem

The central question of philosophy of science is demarcation: what distinguishes science from non-science? The logical positivists of the early twentieth century proposed verification — a statement is scientific if it can, in principle, be confirmed by observation. But Karl Popper showed that verification cannot work: no finite number of observations can confirm a universal law, because the next observation might falsify it. Instead, Popper proposed falsifiability: a theory is scientific not because it can be proved true, but because it can, in principle, be proved false. A theory that is compatible with every possible observation tells you nothing about the world.

Thomas Kuhn complicated this picture further. In The Structure of Scientific Revolutions (1962), Kuhn argued that science does not progress by steady accumulation of truths. It operates within paradigms — frameworks of assumptions, methods, and exemplary problems that define what counts as legitimate inquiry. When anomalies accumulate that the paradigm cannot explain, the result is not a gradual correction but a paradigm shift: the old framework is replaced wholesale. Newtonian physics was not refined into Einstein’s relativity; it was replaced. The transition is not purely rational — it involves social, institutional, and even aesthetic factors.

The problem of induction

Beneath the demarcation problem lies a deeper one: the problem of induction. Science depends on generalising from observed cases to unobserved ones — every swan I have seen is white, therefore all swans are white. But David Hume showed in the eighteenth century that this inference has no logical foundation. The past does not guarantee the future. The sun has risen every morning of recorded history, but no logical argument proves it will rise tomorrow. Science works — but it cannot prove that it will continue to work, and any attempt to justify induction by appealing to its past success is itself an inductive argument.

This is not a reason to abandon science. It is a reason to understand what science is and what it is not. Science produces the best available explanations of natural phenomena, but its conclusions are always provisional, always subject to revision, always held with the awareness that the next observation might overturn them. This provisionality is not a weakness — it is the source of science’s power. A method that cannot change its mind is not a method of inquiry; it is a dogma.

In the Islamic tradition

The Islamic civilisation produced some of the most important scientific work in human history — in optics, algebra, medicine, astronomy, and chemistry — during a period when Europe was largely pre-scientific. This is not a polite compliment; it is a historical fact whose implications deserve to be understood rather than merely celebrated.

The philosophical foundation for this achievement was the conviction — shared by the Mu’tazilah, the falāsifah, and many jurists — that the natural world is an ordered system of real causes and effects, created by God and therefore worthy of study. The Qur’anic injunctions to observe, reflect, and learn from nature were taken as religious warrants for empirical inquiry. Ibn al-Haytham’s Book of Optics (c. 1011) is not merely a contribution to physics; it is a methodological revolution — the first systematic insistence that theories must be tested against controlled observation, not accepted on the authority of Aristotle or anyone else.

What undermined this tradition was not a lack of talent or piety but a theological shift. The Ash’arite doctrine ofoccasionalism— the claim that God is the only real cause, and that what we call natural causation is merely God’s habit — removed the philosophical foundation on which natural science depends. If fire does not really burn cotton, there is nothing in the nature of fire worth investigating. The world becomes a theatre of divine will rather than a system of intelligible laws. Over centuries, this framework did not prohibit science, but it withdrew the metaphysical motivation for doing it.

Iqbal’s position is that the Qur’an itself demands the recovery of empirical inquiry. The repeated injunction to “observe” and “reflect” is not decorative — it is an epistemological programme. But Iqbal also insisted that science, properly understood, is not the whole of knowledge. It tells us how the world works; it cannot tell us what the world means. The mistake of the modern West, in Iqbal’s view, was to collapse all knowledge into scientific knowledge — to treat the method as the only method. The task is to recover science without surrendering the forms of knowledge that science, by its own criteria, cannot reach.

Why this matters

Pakistan produces thousands of science graduates every year who have never been asked the question: what makes this science?They can perform experiments, apply formulas, and reproduce results — but they cannot explain why an experiment proves anything, what distinguishes a scientific explanation from a non-scientific one, or why the method they are using works at all. They have been trained in science without ever encountering philosophy of science — which is like learning to drive without understanding how engines work. It functions, until it doesn’t.

The consequences are visible everywhere. The “scientific miracles of the Qur’an” genre, enormously popular in Pakistan, treats scripture as a source of scientific predictions — confusing two categories of knowledge in a way that damages both. Homeopathy is practised alongside evidence-based medicine with no sense that these represent fundamentally different epistemic claims. Conspiracy theories flourish because the skills required to evaluate evidence — to distinguish a credible source from an authoritative-sounding one — were never cultivated.

Iqbal understood that the recovery of science in Muslim civilisation is not a matter of building more laboratories — it is a matter of recovering the philosophical foundations that make science intelligible: the conviction that nature operates through real causes, that these causes can be investigated, and that the results of investigation must be accepted even when they are uncomfortable. This is what Tadreej means by Epistemic Confidence — not confidence that you are right, but confidence in the methods by which rightness and wrongness can be distinguished.

Connections

Epistemology Empiricism and rationalism

Appears in

Lecture I (Sections 5–8) · Lecture II (Sections 1–3) · Lecture VII (throughout)