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You can edit your unborn child's genes to prevent a fatal hereditary disease — but the edit may alter personality traits you cannot predict.

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Why this dilemma matters

There is no clean answer here — the dilemma forces a trade between two legitimate moral claims. Choosing “Edit the genome: eliminate certain death, accept unknown changes to who they may become” prioritises a more principled outcome; choosing “Don't edit: preserve their natural identity, knowing they will likely face a fatal illness” gives more weight to a more pragmatic outcome.

Worth asking yourself

  • Would you defend this choice to someone affected by it?
  • Is the principle worth the concrete cost?

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