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I can't bear to be on a train without a book", she announced.
" It's a form of self-defence in a way" .
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If she and Sam ever had kids, they'd be gluten-intolerant out of self-defence.
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A decent government with an effective, but not gratuitously violent, police force and a fair court system are essential. This deters and incapacitates psychopaths, bullies and hotheads - and if it earns the confidence of the people, they don't have to become violent in self-defence.