The full version of Schneider's quote is available on-line in an article
from the APS newsletter.  The APS encourages redistribution of its
materials provided they are not truncated or changed; therefore I have
not deleted the rest of the article (in my copy), but only added a link to 
the section that contains the quote itself.

Schneider quote link
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   APS News Online August/September 1996 Edition
   
Don't Bet All Environmental Changes Will Be Beneficial

   by Stephen H. Schneider, Prof., Dept. of Biological Sciences and Sr.
   Fellow Inst. for International Studies, Stanford University
   
   Editor's note: Professor Schneider was offered space to express his
   views following the publication of an erroneous quote attributed to
   him in the March issue. The opinions expressed are the author's and
   not necessarily those of the APS, its elected officers or staff.
   
   Perhaps you shouldn't believe me, at least that is what Julian Simon's
   characterization of my views of environmental threats would lead you
   to believe in APS News Back Page article (March 1996, pg. 12). Simon
   "quotes" me directly, as supposedly saying "Scientists should consider
   stretching the truth..." to get good publicity for their cause. After
   the March issue was in print, Simon notified the editor that this
   false and very damaging statement was incorrect. What he hasn't yet
   admitted is that even what he states to be the "correct quote" is
   still an out-of-context misrepresentation of my views, a distortion he
   persists in perpetuating even months after I personally told him of
   the context of the original quote.
   
   The Simon APS News article offers to bet environmentalists "...that
   any trend in material human welfare will improve rather than get
   worse." This article echoes an editorial essay entitled "Earth's
   Doomsayers Are Wrong" that appeared in the 12 May 1995 San Francisco
   Chronicle open forum. Simon then said that "Every measure of material
   and environmental welfare in the U.S. and the world has improved..."
   and that "All long run trends point in exactly the opposite direction
   of the doomsayers" Thus he implied that few, if any people would
   likely accept his bet since for the past 25 years the pessimists have
   been "proven entirely wrong." When my Stanford colleague, Paul
   Ehrlich, and I took up his challenge1 and named 15 environment-related
   trends we were willing to bet would deteriorate, Simon refused
   claiming to the Chronicle (18 May 1995) that "I do not offer to bet on
   the progress of particular physical conditions such as the ozone
   layer" (as if its decline were not a negative measure of environmental
   welfare!).
   
   In November, 1995, I debated Simon on Lateline, the Australian TV
   equivalent of the US Nightline program, on the issue of the Chronicle
   bet. In a segment they did not air, Simon charged that I advocate
   exaggerating science to enhance the appearance of environmental
   threats. To bolster this charge he resurrected an oft-quoted, but
   usually out of context partial quote, from a Discover Magazine
   interview2 in 1989 in which I decried soundbite science and journalism
   by pointing out that nobody gets enough time in the media either to
   cover all the caveats in depth, (i.e., "being honest") or to present
   all the plausible threats (i.e., "being effective"). During the TV
   debate, months before Simon's APS News article appeared, I pointed out
   that he was taking only part of the full quote and that part was
   seriously out of context - this is the same source he "quoted" in APS
   News. The full quote follows, where I have italicized what portions
   of it Simon quoted and bracketed what I did not say but he attributed
   to me in the APS News article:

   "On the one hand, as scientists we are ethically bound to the
   scientific method, in effect promising to tell the truth, the whole
   truth, and nothing but - which means that we must include all the
   doubts, the caveats, the ifs, ands, and buts. On the other hand, we
   are not just scientists but human beings as well. And like most people
   we'd like to see the world a better place, which in this context
   translates into our working to reduce the risk of potentially
   disastrous climatic change. To do that we need [Scientists should
   consider stretching the truth] to get some broadbased support, to
   capture the public's imagination. That, of course, entails getting
   loads of media coverage. So we have to offer up scary scenarios, make
   simplified, dramatic statements, and make little mention of any doubts
   we might have. This 'double ethical bind' we frequently find ourselves
   in cannot be solved by any formula. Each of us has to decide what the
   right balance is between being effective and being honest. I hope that
   means being both."2
   
   Vested interests have repeatedly claimed I advocate exaggerating
   threats. Their "evidence" comes from partially quoting my Discover
   interview, almost always -like Simon - omitting the last line and the
   phrase "double ethical bind." They also omit my solutions to the
   double ethical bind: (1) use metaphors that succinctly convey both
   urgency and uncertainty (pg. xi of Ref. 3) and (2) produce an
   inventory of written products from editorials to articles to books, so
   that those who want to know more about an author's views on both the
   caveats and the risks have a hierarchy of detailed written sources to
   which they can turn.3,4,5 What I was telling the Discover interviewer,
   of course, was my disdain for a soundbite-communications process that
   imposes the double ethical bind on all who venture into the popular
   media. To twist my openly stated and serious objections to the
   soundbite process into some kind of advocacy of exaggeration is a
   clear distortion. Moreover, not only do I disapprove of the "ends
   justify the means" philosophy of which I am accused, but, in fact have
   actively campaigned against it in myriad speeches and writings.
   Instead, I repeatedly advocate that scientists explicitly warn their
   audiences that "what to do" is a value choice as opposed to "what can
   happen" and "what are the odds," which are scientific issues (e.g. p.
   213 of Ref. 3). I also urge that scientists, when they offer
   probabilities, work hard to distinguish which are objective and which
   are subjective, as well as what is the scientific basis for any
   probability offered. For such reasons I was honored to receive, in
   1991, the AAAS/Westinghouse Award for the Public Understanding of
   Science.
   
   If the readers of APS News are confused by all this rancor and want a
   fair and balanced treatment of environmental scientific and policy
   debates, they can turn to the several National Research Council or
   IPCC assessments,6 in which words like "any," "all," "every," and
   "entirely" are scarce, and citations are quoted or paraphrased in
   their proper context.
   
   References
   1. P.R. Ehrlich and S. H. Schneider, Environmental Awareness, 18 (2)
   pp. 47-50. (1995).
   2. J. Schell, Discover, pp. 45-48, Oct. 1989.
   3. S.H. Schneider, Global Warming: Are We Entering the Greenhouse
   Century? (Vintage 1990).
   4. S.H. Schneider, with L.E. Mesirow, The Genesis Strategy: Climate
   and Global Survival. (Plenum NY 1976).
   5. S.H. Schneider, National Geographic Research & Exploration 9 (2),
   173-190 (1993).
   6. Intergovernmental Panel on Climatic Change (IPCC), Climate Change
   1995. The Science of Climate Change. Edited by J.T. Houghton etal.
   (Cambridge Univ. Press, Cambridge, UK, 1996).
   
   
     _________________________________________________________________
   
   Copyright 1996, The American Physical Society.
   The APS encourages the redistribution of the materials included in
   this newsletter provided that attribution to the source is noted, the
   materials are not truncated or changed.
     _________________________________________________________________