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Clear Quote by Karl Popper

“It is clear that everybody interested in science must be interested in world 3 objects. A physical scientist, to start with, may be interested mainly in world 1 objects--say crystals and X-rays. But very soon he must realize how much depends on our interpretation of the facts, that is, on our…” quote by Karl Popper
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“It is clear that everybody interested in science must be interested in world 3 objects. A physical scientist, to start with, may be interested mainly in world 1 objects--say crystals and X-rays. But very soon he must realize how much depends on our interpretation of the facts, that is, on our theories, and so on world 3 objects. Similarly, a historian of science, or a philosopher interested in science must be largely a student of world 3 objects.”

Karl Popper

About This Quote

Source Book: "The Logic of Scientific Discovery", 1934

Scientists must engage with theoretical interpretations (world‑3) as well as empirical data (world‑1) to understand reality.

In simple terms: Science needs both experiments and ideas.

Key Takeaway

Balance observation with theory.

Themes

science philosophy methodology

Mood

analytical thoughtful

Type

academic philosophical

When to use this quote

  • research labs
  • academic curricula
  • policy analysis

Key Concepts

theory empiricism interpretation

Questions to Reflect On

  • How do you integrate theory and data?
  • What role does interpretation play in your field?
A Different Perspective

Overemphasis on theory can neglect practical testing.

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