Evidence Law in times of a “Big Data Revolution”

The ‘Big Data Revolution’ has allowed accumulating significant amounts of statistical data covering all areas of life. Such data can have high probative value in legal trials. Still, courts in and outside the UK have been ambivalent about the possibility of making legal judgements based solely on statistics. The presen­ta­tion will seek to uncover the root of this ambivalence, and to suggest that it highlights a fundamental connection between practical normativity and epistemic normativity. The argument will be that a Razian concept of respect for persons provides reasons against legal judgments of liability based solely on statistics. This is because statistics logically bar the elimination of the risk of error, and relatedly, they cannot justify belief in the availability of reasons to make a judgment of liability. The presentation will further seek to demonstrate that the argument carries over to non-legal spheres in which the Razian notion of respect plays a role. The UK’s attempt to determine A-level grades algorithmically during the Covid-19 pandemic provides an example.