Optical tracking systems typically trade off between astrometric precision and field of view. In this work, we showcase a networked approach to optical tracking using very wide field-of-view imagers that have relatively low astrometric precision on the scheduled OSIRIS-REx slingshot manoeuvre around Earth on 22 Sep 2017. As part of a trajectory designed to get OSIRIS-REx to NEO 101955 Bennu, this flyby event was viewed from 13 remote sensors spread across Australia and New Zealand to promote triangulatable observations. Each observatory in this portable network was constructed to be as lightweight and portable as possible, with hardware based off the successful design of the Desert Fireball Network. Over a 4-h collection window, we gathered 15 439 images of the night sky in the predicted direction of the OSIRIS-REx spacecraft. Using a specially developed streak detection and orbit determination data pipeline, we detected 2 090 line-of-sight observations. Our fitted orbit was determined to be within about 10 km of orbital telemetry along the observed 109 262 km length of OSIRIS-REx trajectory, and thus demonstrating the impressive capability of a networked approach to Space Surveillance and Tracking.

Anyone familiar with French legal education will know that what a common lawyer would call the contents page to be found at the beginning (often in summary form) or at the end (often in detail) of a French textbook or monograph on law is more than a mere guide for browsers and readers. It forms le plan, that is to say the epistemological framework the intellectual importance of which is equal to the substance of the work. It is what endows the book with its scientific credibility and any thesis or textbook lacking a coherent cartesian plan will by definition lack intellectual credibility. But what of the other guide provided in many academic books, namely the index? Is this guide nothing but a guide, never to be allowed to aspire to an epistemological status like that accorded to le plan? Or is an index, with its strictly alphabetical ordering, capable of having an epistemological role?

In this paper, stimulated by the publication some years ago in France of a small book on medical reasoning, legal and medical reasoning are compared. The question that is asked is whether the differences between the two types of reasoning will permit one to have a better understanding of some of the methodological and epistemological issues associated with legal reasoning. It will be argued that although medical and legal reasoners do share things in common, legal reasoning, perhaps unlike medical reasoning, is actually concerned less with the explanation or even comprehension of texts or the facts of a dispute (explicatio causæ) and more with what will be termed the ‘manipulation’ of facts (accommodatio factorum). Lawyers purify and (or) construct ‘virtual’ factual situations out of perceived ‘actual’ factual situations in order to make them conform or not conform in an isomorphic way with factual situations implied by a legal text or precedent. Medical reasoning is equally complex but facts are read in a different way.

A relatively recent collective work published in France examines the extent to which social science knowledge is cumulative. However this work includes no chapter on law. The purpose of this paper is to imagine what a chapter on law might look like had one been invited by the editor. Is legal knowledge cumulative? This present paper is sceptical, although much depends on where one erects the boundaries between law and other social science disciplines. Yet, despite the scepticism, a reflection on cumulativeness and legal knowledge is not without interest. Indeed quite the opposite: for it generates a range of interesting sub-questions such as whether or not there have been paradigm changes in the discipline of law amounting to scientific revolutions.

The purpose of this paper is to examine a new work on legal reasoning by two American jurists whose aim is to ‘demystify’ it. The paper will not dispute the authors' central thesis that the existence of special forms of reasoning in law is false, but it will argue that a social science epistemologist would find their analysis at best inadequate. It will be argued that legal reasoning is not just reasoning from and about rules; it is also reasoning about facts and about the construction of factual situations. Consequently, it is vital for anyone wishing to have a serious understanding of how lawyers reason to have a familiarity with how social scientists, and indeed natural scientists, reason about fact. Such reasoning certainly involves induction, deduction and analogy but these methods are by no means adequate as an epistemological framework; schemes of intelligibility and paradigm orientations are equally important. If there is one paradigm orientation that is special to certain disciplines like theology and law, it is the authority paradigm, an orientation that must be distinguished from an inquiry paradigm. The problem with works by legal philosophers on legal reasoning is, it will be implied, that they are often conducted from within the authority paradigm and that this, in the end, prevents any demystification.

The question to be pursued in this article has the merit of simplicity even if the response to it proves somewhat complex. The question is this: is law truly a social science? This may seem an odd question to many in the common law world since it is not uncommon, at least in England, for law schools to find themselves located in faculties of social science. Moreover there are a number of individuals, perhaps a considerable number in common law departments and faculties throughout the world, whose research and scholarship undoubtedly qualifies as social science research. So, before one can even begin to reflect upon the question to be pursued in this paper, a preliminary question must first be asked. Why should one wish even to pose the question?