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Common Quote by Bertrand Russell

“Inferences of Science and Common Sense differ from those of deductive logic and mathematics in a very important respect, namely, when the premises are true and the reasoning correct, the conclusion is only probable.” quote by Bertrand Russell
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“Inferences of Science and Common Sense differ from those of deductive logic and mathematics in a very important respect, namely, when the premises are true and the reasoning correct, the conclusion is only probable.”

Bertrand Russell

About This Quote

Inductive reasoning yields probable conclusions, unlike deductive logic which guarantees certainty when premises are true.

In simple terms: Induction offers likelihood, deduction offers certainty.

Key Takeaway

Use both reasoning types appropriately.

Themes

logic probability science

Mood

analytical critical

Type

educational philosophical

When to use this quote

  • research design
  • every‑making
  • education

Key Concepts

induction deduction epistemology

Questions to Reflect On

  • When should you trust an inductive claim?
  • How do you test probabilistic conclusions?
A Different Perspective

Inductive conclusions can be wrong if premises are flawed.

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