ELSI (Ethical, Legal and Social Implications) initiatives are frequently attached to major science programmes. The expectation is that ELSI research will produce a practical advanced assessment of the impacts of technological development. Williams' overview of the field demonstrates that this encourages a mechanistic understanding of technological development leading to compressed foresight, i.e. the notion that the future is imminent in the present. The development of the ELSI domain in Canada has been characterised by an affinity between the types of knowledge valorised by the field and modes of legal reasoning, suggesting a legal variant of compressed foresight. The concept of juridification and an analysis of two related modes of legal reasoning (analogy and reflective equilibrium) shed light on the connection between legal reasoning and the ELSI field in Canada. The deployment of the aforementioned modes of legal reasoning enables law to define and operationalise difficult questions by drawing on currently existing principles and precedents. Thus, when legal modes of reasoning are brought to bear on ELSI questions, the future is made a calculable and manageable extension of the present, dovetailing with the ELSI field's requirement of pragmatic, advanced assessment.