|Foresight Update 3 - Table of Contents|
In a recent "Science Court" cover story in OMNI
magazine, writer Ed Regis asked prominent scientists to decide
cases involving both scientific or technological and ethical
issues--the sorts of issues normally decided by social norms,
legislation, or a court of law. This mixing of issues violates
the most basic premise of the science court (SC) procedure,
developed by Arthur
Kantrowitz, which has as its ideal the separation of
scientific and technological questions from legal, ethical, and
The SC goal is not to permit scientists to make pronouncements on public policy issues, but rather just the opposite: to enable society to extract from expert communities their best available understanding of scientific and technological facts, burdened by a minimum of personal opinion from the technical people involved. This technical understanding could then be used by legislators, judges, and other policymakers selected by society in the usual ways. Proponents of the idea readily admit that perfect separation of facts from values is not possible, but maintain that we as a society could get a clearer understanding of technical realities by means of the SC procedure than by means of media wars, secret committees, and congressional hearings.
The OMNI article features "decisions" from ten prominent scientists including physicist Stephen Hawking, MIT's Seymour Papert, Edward Teller, and computer scientist Joseph Weizenbaum. They were asked to make legal or ethical pronouncements on surrogate motherhood, genetic engineering in humans, alleged psychic powers, patenting genetically engineered animals, and ownership of ancient human bones.
One scientist, the late Richard Feynman, refused to participate on the excellent grounds that scientists have no special ability to solve legal and ethical issues: "Suppose I had one hundred percent access to the facts and one hundred percent knowledge of the laws of nature. None of this would tell me whether a surrogate mother should keep her baby or whether designer animals ought to be patented."
The other participants presumably were either unfamiliar with the original SC concept or were unable to resist the temptation to mix their personal ethical views with their scientific knowledge--a temptation the SC procedure is designed to circumvent.
The SC is not a new proposal; it has been endorsed by various presidential candidates in past elections. Originally seen as a function within government, the idea has evolved into a procedure which could be used in a decentralized way, for example at universities.
As stated by Arthur Kantrowitz (now a professor at Dartmouth) in his letter of correction to OMNI, "There have been exercises at Berkeley and Dartmouth which have helped in developing procedures. But the task is difficult partially because some scientists prefer high priests' robes to labcoats. Again some people prefer not having to stretch their minds enough to deal with the moral and ethical problems posed by a science-based technology which grows more and more powerful at an explosive rate. Those who would control this force ... must get the scientific facts from the scientific community. However, they must form their own moral and ethical judgments."
The confusion about the role of the science court is partly due to its name, which was given to Dr. Kantrowitz's idea by the media. It implies a similarity to a traditional court of law, which by its nature cannot confine itself to matters of technical fact. The name gives the impression that the SC could make public policy, just as today's courts of law effectively make public policy by determining how laws are interpreted. Here at FI we substitute the term "fact forum"; Dr. Kantrowitz now uses the term "scientific adversary procedure."
Another problem the SC meme has faced is the difficulty of arranging in-person meetings of busy technical people who, by definition, are adversaries on some issue. FI believes that the establishment of hypertext publishing systems will support online fact forum procedures. Meanwhile, existing software such as DocuForum is being investigated; readers with suggestions on this should contact FI.
For more on the SC/fact forum idea, see an account of the first three trial SC procedures in a university setting, to be published by Roger Masters and Arthur Kantrowitz in the upcoming book Technology and Politics (ed. Michael Kraft and Norman Vig, Duke University, in press). A basic explanation of the idea is available in Engines of Creation (K. Eric Drexler, Doubleday, 1986).--Editor
[Note: More recent information is available on the Web at "Twenty-Five Year Retrospective on the Science Court"]
|Foresight Update 3 - Table of Contents|
When faced with something as novel as nanotechnology, it makes
sense to look for familiar analogies. Previous publications have
compared nanomachines to conventional macromachines, but in
important ways nanomachines more closely resemble software
systems. Consider the properties of software and conventional
machines, then the parallels with assembler-built nanomachines.
Macromachines are made of parts which contain vast numbers of atoms in ill-defined patterns. Having so many atoms, these parts can be made in what amounts to a continuum of sizes and shapes, formed by continuous, analog techniques--molding, cutting, grinding, etching, and so forth. These parts are always imprecise. Machines are made by fitting parts together; in a good design, imprecisions won't add up to exceed overall tolerances. In operation, parts typically change shape slowly--they wear out and fail.
Software mechanisms differ radically. Their parts consist of discrete bits in defined patterns--they do not form a continuum. There is no need to make bits, as there is to make mechanical parts. The fabrication of bit-patterns is a precise, digital process; it is either entirely correct or clearly wrong, never "just a little off." The position of one bit with respect to another is as precise as the mathematical position of "two" with respect to "three."
The digital mechanisms which underlie this precision are made of imprecise devices, but these devices have distinct patterns of interconnection and distinct "on" and "off" states. Failures in the underlying devices can cause sporadic errors in memory and logic, yet if the devices operate within their design tolerances, errors (give or take an occasional cosmic ray) will be completely absent. Digital precision emerges from imperfect devices through a process like that of the automatic alignment found in many computer graphics programs: a device in any state that is nearly-right snaps into a neighboring state that is entirely-right. Each entirely-right state follows from a previous entirely-right state, with no buildup of small errors in, say, the size or alignment of the bits.
Nanomechanisms do have obvious similarities to conventional mechanisms. Unlike software, they will be made of parts having size, shape, mass, strength, stiffness, and so forth. They will often include gears, bearings, shafts, casings, motors, and other familiar sorts of devices designed in accord with familar principles of mechanical engineering. In most respects, nanomechanical parts will resemble conventional parts, but made with far, far fewer atoms. They will little resemble the algorithms and data structures of software.
And yet their similarity to software and digital mechanisms will be profound. As software consists of discrete patterns of bits, so nanomechanisms will consist of discrete patterns of atoms. Atoms, like bits, need not be made; they are both flawless and available without need for manufacture. The parts of nanomechanisms will not form a continuum of shapes, built by inaccurate analog processes; they will instead be chosen from a discrete set of atom-patterns, and (like bit patterns) these patterns will be either entirely correct or clearly wrong. In stacking part on part there will be no buildup of small errors, as there is in conventional systems.
As in digital circuits and computer graphics programs, a principle of automatic alignment comes into play. When an assembler arm positions a reactive group against a workpiece, forcing a reaction, imprecision of the arm's alignment won't cause imprecision in the position of the added atoms. In making a well-bonded object, molecular forces will snap the atoms either into the proper position, or into a clearly wrong position. (As Marvin Minsky remarks, quantum mechanics doesn't always make things more uncertain--quantum states can be extraordinarily definite and precise.) Assembly can with high reliability yield a perfect result.
And again like software, nanomechanisms won't wear out. So long as all the atoms in a mechanism are present, properly bonded, and not in a distinct, excited state, the mechanism is perfect. If an atom is missing or displaced (say, by radiation damage) the mechanism isn't worn--it is broken.
In their shapes and functions, nanomechanisms will be much like ordinary machines. But in their discreteness of structure and associated perfection--to say nothing of their speed, accuracy, and replicability--nanomechanisms will share some of the fundamental virtues of software.
From Foresight Update 3, originally published 30 April 1988.
Foresight thanks Dave Kilbridge for converting Update 3 to html for this web page.
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