Centred or justified body text
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Rule · bucket: judgment · severity: note · detector: none · since: v0.1.0
Section: Things to avoid
Group: Typography

Forbidden:
  A centred paragraph of four lines. Justified text of any length.

Instead:
  Start-align anything longer than a short heading or label.

**Centred** text moves the start of every line, so the eye hunts for it. Acceptable for a heading or a couple of lines; never for a paragraph.
**Justified** text is worse and has no acceptable case here. Stretching word spacing to force a straight right edge creates uneven gaps and vertical "rivers" of white space running down the block — actively harmful for dyslexic readers, and the reason books that justify are harder to read than they look.