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  • It would be wrong to assume that one must stay with a research programme until it has exhausted all its heuristic power, that one must not introduce a rival programme before everybody agrees that the point of degeneration has probably been reached.

    Imre Lakatos, John Worrall, Gregory Currie (1980). “The Methodology of Scientific Research Programmes: Volume 1: Philosophical Papers”, p.68, Cambridge University Press