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Captcha idea: Ask visitors which direction a optical illusion is "moving"

• vitarnixofntrnt 1y ago
  [dead]
• emedchill 1y ago
  so... there would only be 4 possible choices for a bot to make to guess correctly?
  • emedchill 1y ago
    left, right, up, and down?
    • vitarnixofntrnt 1y ago
      [dead]