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The true function of logic ... as applied to matters of experience ... is analytic rather than constructive; taken a priori, it shows the possibility of hitherto unsuspected alternatives more often than the impossibility of alternatives which seemed prima facie possible. Thus, while it liberates imagination as to what the world may be, it refuses to legislate as to what the world is.

Bertrand Russell#73

PhilosophyLogicRealityCreativityAnalysisImaginationPossibility

About this quote

What does it mean?
Logic's role is to reveal new possibilities rather than dictate reality; it expands imagination without prescribing what is.
In plain terms
Logic shows new possibilities, not what is true.
What can you take from it?
Use logic to explore alternatives, not to limit imagination.

Where it applies

  • problem solving
  • creative brainstorming

Putting it to work

  • apply logical analysis to generate options
  • avoid over‑reliance on logical certainty

Questions to consider

  • When does logic become a constraint?
  • How can we balance logical rigor with creative freedom?

Another view

Logic cannot guarantee practical feasibility of imagined alternatives.

More from Bertrand Russell

  1. The life of man is a long march through the night, surrounded by invisible foes, tortured by weariness and pain, towards a goal that few can hope to reach, and…

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  2. The conception of the necessary unit of all that is resolves itself into the poverty of the imagination, and a freer logic emancipates us from the straitwaistc…

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  3. The slave is doomed to worship time and fate and death, because they are greater than anything he finds in himself, and because all his thoughts are of things …

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