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The Library
of Alexandria

Flatland, Section 5 summary

Section 5 of 22 · Part 1: This World · 7 min to read the section

In Section 5, the narrator explains how Flatlanders identify people through hearing and touch, despite seeing almost everyone as a line. He describes dangerous introductions, an ancestral accident, and schools that exploit low-angle Isosceles people, showing how recognition practices support social rank while leaving a third method unexplained.

What happens

  1. The narrator explains that voices distinguish friends and some classes, but imitation and similar voices make hearing unreliable.
  2. Touch identifies most classes through a single angle, although polygons with many sides are harder to distinguish.
  3. Feeling requires stillness because a sudden movement can injure or kill the person making contact.
  4. The narrator recounts an ancestor’s accidental stabbing of a Polygon and the resulting setback to his family’s advancement.
  5. Schools teach angle recognition with chained Isosceles people, sometimes withholding food and replacing them monthly.
  6. The narrator judges touch more reliable than hearing but notes that its dangers encourage another method.

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Why must someone being identified by touch remain still?

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