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发表于 2012-8-14 00:55
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其实比饶毅更牛的回复是 Upenn 的 LAI JIANG4 g3 x- Y$ S5 N$ }/ ^
如果是中国长大的,英语能到这种程度真是很不简单。9 D" B9 R* u0 g M% m$ V
1 d1 y7 Q1 g5 p4 [# b8 r, S# \http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself
$ J1 z1 F; v6 ~% A, regard as one of the most prestigious and influential physical-science
) a; \/ T/ b( n6 Zmagazines — publish a thinly veiled biased article like this. Granted, this% p0 j: _! v5 z0 M5 X
is not a peer-reviewed scientific article and did not go through the! _( D" s2 A* g2 u% D5 W
scrutiny of picking referees. But to serve as a channel for the general4 d" _8 c- T L
populace to be in touch with and appreciate science, the authors and editors
' P% d: F4 M$ E% S1 X* xshould at least present the readers with facts within the proper context,
8 b7 h4 n4 l t. vwhich they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
+ K6 ]. z$ Y" M5 x6 [) l1 n) QOlympic 400-metre IM time with her performance at the World Championships in3 Y+ d, l3 ?( e. X3 R! x6 _" B
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “' h! f! M) K4 F
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
, e0 N3 V. v9 i& N- D" vpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an) q" L) p5 D! d; t" A0 d
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the3 M& y3 L1 Y7 y4 j R( s/ h
difference between the gold and silver medal, I see no reason for 5.38 s to
+ d- ]/ \3 Z% Y( w7 W3 tbe treated as 7 s.) a. v |" z# _1 P3 i/ ~$ b. T
. V9 u( \5 ~- ~4 z" g& @- V w4 NSecond, as previously pointed out, Ye is only 16 years old and her body is
( D5 c, ]* K2 O/ E( e" {still developing. Bettering oneself by 5 seconds over two years may seem
+ ~1 q& B4 ^ }, L; x0 qimpossible for an adult swimmer, but it certainly happens among youngsters.
+ \# m. U2 _' L$ v8 c8 iAn interview with Australian gold medallist Ian Thorpe revealed that his 400
: C) S5 c* y" ~9 E-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
+ |( ?) o/ x0 y2 E; {6 J0 e9 aFor regular people, including Callaway, it may be hard to imagine what an" K8 w& S! ]( n2 i
elite swimmer can achieve as he or she matures and undergoes scientific and
0 F) q$ y3 R" [2 h( S8 D- Opersistent training. But jumping to the conclusion that it is “anomalous”
& k8 R! }7 M6 J7 \: G. obased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.! Q8 K/ N" X4 j# }0 n) W' u
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook7 Q% _8 p/ B) D5 {5 W5 n" r
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in! o- i* ^1 J4 L; W; I5 i+ v3 t
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so" n! j7 I4 P- d3 i: F3 ]0 I
he chose not to push himself too hard and to conserve his energy for later
1 ?; `; x* ^ D$ x2 f- Jevents (whether this conforms to the Olympic spirit and the ‘use one’s
4 E, G- d8 n4 nbest efforts to win a match’ requirement that the Badminton World n# J, F* _0 P5 w7 S) X* ^
Federation recently invoked to disqualify four badminton pairs is another& F( N r1 D. _$ ^; X0 L
topic worth discussing, though probably not in Nature). Ye, on the other
# ]: h6 \% X" Whand, was trailing behind after the first 300 metres and relied on freestyle
6 l* R6 [( k g' B. s& X& [4 O( c, in which she has an edge, to win the race. Failing to mention this
* i" E5 T) M) Z: M+ Tstrategic difference, as well as the fact that Lochte is 23.25 seconds5 F( R$ S5 V# Y! c
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
+ S0 ~9 E/ i4 w; B; Cfaster than the best man in the same sport, which sounds impossible. Putting
# X+ T. b5 v, B' w# m4 T) kaside the gender argument, I believe this is still a leading question that( u# m+ V( C- R* A0 W. ^
implies to the reader that there is something fishy going on.5 c0 a$ R, W0 [1 [# w1 B- Y
9 {- ^( ?4 B/ o9 o( rFourth is another example of cherry-picking. In the same event, there are1 E- _5 F d: e; M* {9 w
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93: p. H" n1 l* \- a7 v0 l8 h
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s. D! f1 l* c* D/ |
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns K- X4 o* S8 K2 u/ F( S4 o8 `" X' E
out, if we are just talking about the last 50 metres in a 400-metre IM,2 K* p6 \. |6 {" Z* p- d
Lochter is not the example I would have used if I were the author. What kind
, ]1 g+ n1 A2 T+ R. }of scientific rigorousness is Callaway trying to demonstrate here? Is it
O3 Q9 h% c1 ?" [logical that if Lochter is the champion, we should assume that he leads in
, h8 p8 p9 `* {/ Hevery split? That would be a terrible way to teach the public how science
! e6 \$ ^8 H8 H' e% \% r- v( p1 A. Iworks.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
4 K) \& k5 U2 G: d$ W; nimplies that a drug test cannot rule out the possibility of doping. Is this% Q: f3 v. u. V* \) f7 g
kind of agnosticism what Nature really wants to teach its readers? By that. b/ q# S! b) i
standard, I estimate that at least half of the peer-reviewed scientific% S. h( S5 d! Y
papers in Nature should be retracted. How can one convince the editors and
2 R3 N7 n! e- ^, I0 x- Ereviewers that their proposed theory works for every possible case? One' Y S- ]6 Q; w9 D2 m
cannot. One chooses to apply the theory to typical examples and to5 F6 @5 P l- j% S: }4 `4 P9 o5 j
demonstrate that in (hopefully) all scenarios considered, the theory works
, Q! z- d; C7 v4 }; {6 I) nto a degree, and that that should warrant publication until a counterexample2 h. j( `. o, Q
is found. I could imagine that Callaway has a sceptical mind, which is8 m0 x; `9 `7 G- [" n/ e- i
crucial to scientific thinking, but that would be put to better use if he% ~1 _# S0 N. l
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
+ e8 {, J0 y& q: F; E% Nadvanced, non-detectable drug that the Chinese have come up with in the
6 y, U; r, Z r3 _1 j W# mpast 4 years (they obviously did not have it in Beijing, otherwise why not
8 i, d- u+ v6 Z" Huse it and woo the audience at home?), based on data and rational derivation, M7 Q' {5 O5 ?* b j- O3 L: N% u+ Q
. This article, however, can be interpreted as saying that all athletes are
) P- |5 k$ c' W1 U: bdoping and the authorities are just not good enough to catch them. That may( i. C% A- s2 N, C/ w; h1 ^
be true, logically, but definitely will not make the case if there is ever a
f8 o( y( v7 h3 G0 Dhearing by the governing body for water sports, FINA, to determine if Ye1 k2 R' ?6 h; C& j; {
has doped. To ask whether it is possible to obtain a false negative in a1 X' _# T: Q7 R
drug test looks like a rigged question to me. Of course it is possible:
' t+ f$ Q+ K. Xother than the athlete taking a drug that the test is not designed to detect0 j u# c5 a5 ~+ h
, anyone who has taken quantum 101 will tell you that everything is
# ^5 r8 n8 }1 `- Q6 p* H wprobabilistic in nature, and so there is a probability that the drug in an
( I, O3 @; ?/ _8 H4 z. Mathlete’s system could tunnel out right at the moment of the test. A slight
9 o- @, t8 M' @" Achance it may be, but should we disregard all test results because of it?
: z$ {9 G) `# b3 Z0 q; O& ~+ b; s: s& DLet’s be practical and reasonable, and accept that the World Anti-Doping
) a' v$ S- S* x0 t( T8 \5 W# y0 Pagency (WADA) is competent at its job. Ye’s urine sample will be stored for1 k+ z& h/ S3 [- V. h) {' _2 N
eight years after the contest for future testing as technology advances.
/ K0 t8 Z. Z1 t! x1 n# C& \- ~0 LInnocent until proven guilty, shouldn’t it be?( M% _' t) A2 H1 a8 F) Y/ E
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Sixth, and the last point I would like to make, is that the out-of-5 D8 l: |% t0 w
competition drug test is already in effect, which Callaway failed to mention2 p- S2 v. L. w5 |+ p" P/ d
. As noted in the president of WADA’s press release, drug testing for; V( R" Z6 U1 H4 L! P
Olympians began at least six months before the opening of the London
; L6 k6 H7 w. F/ E$ R+ eOlympics. Furthermore, 107 athletes have been banned from this Olympics for6 p) f% T! w: j8 a: O* z. W" u/ V
doping. That may be the reason that “everyone will pass at the Olympic# ^2 h9 d- D) \/ w0 Z0 }: s
games. Hardly anyone fails in competition testing” — those who did dope0 m- w4 p8 L8 e" M7 q$ D7 E
have already been caught and sanctioned. Callaway is free to suggest that a% N8 B/ g+ W5 v
player could have doped beforehand and fooled the test at the game, but this* r0 g7 q, f( P- k% C
possibility is certainly ruled out for Ye.6 p. B4 W: \' Q7 w* w' C
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Over all, even though Callaway did not falsify any data, he did ( A; J3 Y) R" p- c6 V7 ^! Y5 d
intentionally or not) cherry-pick data that, in my view, are far too
* `# v- j7 M" X& a |! hsuggestive to be fair and unbiased. If you want to cover a story of a
* e1 b9 x/ E# c1 l" l# isuspected doping from a scientific point of view, be impartial and provide
* C8 r: Q9 w! L7 n7 a: Dall the facts for the reader to judge. You are entitled to your5 U) s- Y1 `8 C. E
interpretation of the facts, and the expression thereof in your piece,
) C5 O: P& k, eexplicitly or otherwise, but showing only evidence that favours your2 ]' f" O) Y9 Z$ T- x
argument is hardly good science or journalism. Such an article in a journal
4 b; e- C# v) @5 B/ Fsuch as Nature is not an appropriate example of how scientific research or
1 M+ h5 _$ w9 [reporting should be done. |
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