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For manuscript traditions an adequate metric may be defined (one that reflects the psychological “distance” between readings) and a distance matrix calculated. The aim here should be to assign a large distance to changes that are unlikely to happen independently and may be hard to revert by a thinking copyist (cf. Leitfehler), whereas trivial changes (like orthographical orthographic ones) should be assigned a very small distance. Cf. Leitfehler-based method.
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