science

The Logic of Scientific Discovery

The Logic of Scientific Discovery is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand The Logic of Scientific Discovery rather than just read about it. In short: The Logic of Scientific Discovery is a 1959 book about the philosophy of science by the philosopher Karl Popper. Popper rewrote his book in English from the 1934 (imprint '1935') German original, titled Logik der Forschung.

Key takeaways

The Logic of Scientific Discovery belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect The Logic of Scientific Discovery to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of The Logic of Scientific Discovery from memory before moving on to harder problems.

Reference excerpt

The Logic of Scientific Discovery is a 1959 book about the philosophy of science by the philosopher Karl Popper. Popper rewrote his book in English from the 1934 (imprint '1935') German original, titled Logik der Forschung. Zur Erkenntnistheorie der modernen Naturwissenschaft, which literally translates as, "Logic of Research: On the Epistemology of Modern Natural Science"'.

Summary Popper argues that science should adopt a methodology based on falsifiability, because no number of experiments can ever prove a theory, but a reproducible experiment or observation can refute one. According to Popper: "non-reproducible single occurrences are of no significance to science. Thus a few stray basic statements contradicting a theory will hardly induce us to reject it as falsified. We shall take it as falsified only if we discover a reproducible effect which refutes the theory". Popper argues that science should adopt a methodology based on "an asymmetry between verifiability and falsifiability; an asymmetry which results from the logical form of universal statements. For these are never derivable from singular statements, but can be contradicted by singular statements".

Reception The psychologist Harry Guntrip wrote that its publication "greatly stimulated the discussion of the nature of scientific knowledge", including by philosophers who did not completely agree with Popper, such as Thomas Kuhn and Horace Romano Harré. The psychiatrist Carl Jung, founder of analytical psychology, valued the work. The biographer Vincent Brome recalls Jung remarking in 1938 that it exposed "some of the shortcomings of science". The philosopher Paul Ricœur endorsed "procedures of invalidation" similar to Popper's criteria for falsifiability. The historian Peter Gay described the work as "an important treatise in epistemology". The philosopher Bryan Magee considered Popper's criticisms of logical positivism "devastating". In his view, Popper's most important argument against logical positivism is that, while it claimed to be a scientific theory of the world, its central tenet, the verification principle, effectively destroyed all of science. The physicists Alan Sokal and Jean Bricmont argued that critiques of Popper's work have provoked an "irrationalist drift", and that a significant part of the problems that currently affect the philosophy of science "can be traced to ambiguities or inadequacies" in The Logic of Scientific Discovery. The essayist Nassim Nicholas Taleb, in his book The Black Swan, mentions Popper's theory of falsification as a way to combat the effects of confirmation bias, crediting his "insight concerning the fundamental, severe, and incurable unpredictability of the world."

Notes

External links English version publisher's website German version publisher's website The Logic of Scientific Discovery (Philotextes)

Worked examples

Example 1 — a first encounter with The Logic of Scientific Discovery

Start with the simplest possible case. Write down what The Logic of Scientific Discovery claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to The Logic of Scientific Discovery before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about The Logic of Scientific Discovery ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of The Logic of Scientific Discovery

In research: The Logic of Scientific Discovery appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses The Logic of Scientific Discovery in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: The Logic of Scientific Discovery is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1934 non-fiction books, 1959 non-fiction books, Analytic philosophy literature, so understanding it makes those chapters shorter.
In everyday life: Look for The Logic of Scientific Discovery outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study The Logic of Scientific Discovery in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what The Logic of Scientific Discovery means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain The Logic of Scientific Discovery out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is The Logic of Scientific Discovery in simple terms?

Why does The Logic of Scientific Discovery matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study The Logic of Scientific Discovery?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on The Logic of Scientific Discovery.