Causation in Cases of Evidential Uncertainty: Juridical Techniques and Fundamental Issues

This paper reviews from a comparative legal perspective the range of juridical techniques that have been developed in different legal systems to address perceived problems of uncertain alternative causation. It finds that the process of development has generally proceeded in an ad hoc and unprincipled fashion, without regard for overall coherence. It argues for a more principled legal approach in which the appropriate legal response (full liability, proportional liability or no liability) is adopted on the basis of a ranking of the different categories of cases in which problems of causal uncertainty can arise, reflecting the strength (or weakness) of the arguments in favor of the imposition of (at least some) liability.