"Research programmes, besides their negative heuristic, are also characterized by their positive heuristic."

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Writing of history is our only heuristic principle. The Germans have a word for it, einfühlen. It is the ability to experience the past in the present and to recreate it. In my books, I have tried to recreate it in the most natural way possible: History must be integrated into the story without the weight of premonition.

— Gore Vidal