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Lies Quote by C.S. Lewis

“Logic!" said the Professor half to himself. "Why don't they teach logic at these schools? There are only three possibilities. Either your sister is telling lies, or she is mad, or she is telling the truth. You know she doesn't tell lies and it is obvious that she is not mad. For the moment then…” quote by C.S. Lewis
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““Logic!" said the Professor half to himself. "Why don't they teach logic at these schools? There are only three possibilities. Either your sister is telling lies, or she is mad, or she is telling the truth. You know she doesn't tell lies and it is obvious that she is not mad. For the moment then and unless any further evidence turns up, we must assume that she is telling the truth.””

C.S. Lewis

About This Quote

Source Book: The Screwtape Letters by C.S. Lewis, 1942

The passage sat the difficulty of reasoning when evidence is limited, highlighting the need to consider all logical possibilities before concluding.

In simple terms: When facts are scarce, examine all options before deciding.

Key Takeaway

Consider all possibilities before accepting a claim.

Themes

logic reasoning critical thinking

Mood

thoughtful analytical

Type

philosophical educational

When to use this quote

  • legal analysis
  • scientific research
  • every decision making
  • conflict resolution

Key Concepts

deductive reasoning epistemology

Questions to Reflect On

  • What evidence would change your conclusion?
  • How do you handle uncertainty in decisions?
A Different Perspective

Assuming truth without full evidence can lead to errors.

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