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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 JIANG
7 M4 ]* J$ b& e8 o4 \) s4 G: d$ j如果是中国长大的,英语能到这种程度真是很不简单。
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2 @1 [+ Z# a. w; Lhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania: w1 P) S! E3 A* s$ v: a7 M* t- V
& X) o4 B% V: J& W' d+ Q, [" f0 v0 xIt is a shame to see Nature — which nearly all scientists, including myself
$ S& I u* p5 m' z0 s& g, regard as one of the most prestigious and influential physical-science
( G7 w3 _7 \# m5 D. H) ~magazines — publish a thinly veiled biased article like this. Granted, this) m' E+ i C5 s, f1 a) U* ?
is not a peer-reviewed scientific article and did not go through the# ^; p" _, T- G- ]) d4 |. U
scrutiny of picking referees. But to serve as a channel for the general
5 J" A& |* t$ p* p: Apopulace to be in touch with and appreciate science, the authors and editors; }. `" q8 W3 A% h% F+ V6 Q1 m ]
should at least present the readers with facts within the proper context,9 m- K% s% {6 J2 t3 R4 e/ V8 X
which they blatantly failed to do.$ b" Q) K; O) i* V7 V* o I/ b8 Y* g. @
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First, to identify Ye’s performance increase, Ewen Callaway compared her
$ l; F- }8 ?% b* L" T# u* B6 `Olympic 400-metre IM time with her performance at the World Championships in
: J/ F: f. k4 s' w: P8 [! |2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
) w3 K/ r1 y. S' s7 j( s3 Aanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous$ C. B! e+ M. C# T; [- c
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
0 _8 C1 r) a" `2 {improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
; f( M# g3 F: n5 cdifference between the gold and silver medal, I see no reason for 5.38 s to
1 u& v) j/ V8 o4 ibe treated as 7 s.
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! a( C8 O, p. I2 FSecond, as previously pointed out, Ye is only 16 years old and her body is" k; h ]- d* q( y# q, Z
still developing. Bettering oneself by 5 seconds over two years may seem
# b3 G& U- j v1 r. m( ]impossible for an adult swimmer, but it certainly happens among youngsters.
; [# P) U- V( S4 QAn interview with Australian gold medallist Ian Thorpe revealed that his 4009 j/ s: C( s+ X" \2 j$ m6 k. _
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.6 M% p$ R# w6 n+ A4 M
For regular people, including Callaway, it may be hard to imagine what an$ A, D( e. ?" B6 c, A$ @7 b, j* }
elite swimmer can achieve as he or she matures and undergoes scientific and
$ G# w+ |! i- T8 `# N, Ipersistent training. But jumping to the conclusion that it is “anomalous”
1 u8 W4 I/ r& dbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.$ J" t9 u0 W8 ` p0 i3 M/ h
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook0 U# j" u7 D, B, x# f
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in: j, ]# }' |8 e3 l
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so) _/ N5 }; y0 R9 j a) y, h# f
he chose not to push himself too hard and to conserve his energy for later. w5 Q% h. I9 G. m, K
events (whether this conforms to the Olympic spirit and the ‘use one’s
1 D; [' L$ e3 Y9 S/ b8 Mbest efforts to win a match’ requirement that the Badminton World
: F$ G/ q) M/ r) y& {* X8 `Federation recently invoked to disqualify four badminton pairs is another
- g+ p5 l& S( [8 Rtopic worth discussing, though probably not in Nature). Ye, on the other
0 t- d/ N. A) K5 W, [( uhand, was trailing behind after the first 300 metres and relied on freestyle1 \& A6 B- c7 k% _2 D
, in which she has an edge, to win the race. Failing to mention this5 O1 i' k1 V' g
strategic difference, as well as the fact that Lochte is 23.25 seconds
( i. h& S' G. K% r4 d9 y# ?$ x" Xfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
4 Z! T- }2 A1 t9 S; f( x2 Tfaster than the best man in the same sport, which sounds impossible. Putting
8 W" a2 G5 p% P: j1 b8 faside the gender argument, I believe this is still a leading question that
; y" t) L6 N, S- {2 q' [implies to the reader that there is something fishy going on.6 `. H+ u) g2 B
3 E2 t3 U: y# C1 }Fourth is another example of cherry-picking. In the same event, there are
6 N1 i+ J1 ~5 Z! D( ~6 W# Rfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
& f5 v) b4 O: e* T& R5 W* o* {8 g4 ^s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
) a# t% ~& g( {9 `) h5 p) S; I- @), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
. @1 o# A. }! t, s( H( wout, if we are just talking about the last 50 metres in a 400-metre IM,
6 y3 r! L+ ]4 z+ MLochter is not the example I would have used if I were the author. What kind
9 H' U, i. J7 ]7 C% ]8 ^of scientific rigorousness is Callaway trying to demonstrate here? Is it5 w/ m. s6 m/ ?" B, a
logical that if Lochter is the champion, we should assume that he leads in
* j6 V7 @4 n% v* E, h8 i$ J; Uevery split? That would be a terrible way to teach the public how science/ W& l; g ]9 M$ D/ z, |( T7 o* ]; ~
works.9 |4 p# r. V; s7 S- K
: S7 ]9 m* `; a- DFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
4 z' ~3 X/ c9 q* A# ~, kimplies that a drug test cannot rule out the possibility of doping. Is this! d& Y0 e2 q1 m0 F
kind of agnosticism what Nature really wants to teach its readers? By that
( s( A1 ]! l5 s/ sstandard, I estimate that at least half of the peer-reviewed scientific; \+ y) k4 \2 |3 j5 [
papers in Nature should be retracted. How can one convince the editors and
' ^8 l% z* N! J( f+ Jreviewers that their proposed theory works for every possible case? One
9 s. d. l4 |1 {* x) ] Wcannot. One chooses to apply the theory to typical examples and to+ ~) z4 _* O$ R D1 a8 O c
demonstrate that in (hopefully) all scenarios considered, the theory works
4 R0 ^* Q9 c) ?3 A5 B" x8 Ito a degree, and that that should warrant publication until a counterexample
7 K' b( S- d' y6 lis found. I could imagine that Callaway has a sceptical mind, which is
5 x$ x# s. J, `crucial to scientific thinking, but that would be put to better use if he
& a* H/ F+ f7 P) @' z& xwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly' L% U( H+ p' T+ z5 m
advanced, non-detectable drug that the Chinese have come up with in the: V9 }$ h& t# N) u! {8 o
past 4 years (they obviously did not have it in Beijing, otherwise why not' J1 B8 w5 E3 _5 r' m
use it and woo the audience at home?), based on data and rational derivation4 u; l8 p4 K, _
. This article, however, can be interpreted as saying that all athletes are2 A4 F0 g0 k; B
doping and the authorities are just not good enough to catch them. That may
* q7 ^' [% _' Q6 ?, I0 w$ `be true, logically, but definitely will not make the case if there is ever a# V( P% f/ M6 g) |
hearing by the governing body for water sports, FINA, to determine if Ye% J& ?$ E* ], C7 e# h$ Y
has doped. To ask whether it is possible to obtain a false negative in a/ X. ^3 F' ~+ C( Y i+ x
drug test looks like a rigged question to me. Of course it is possible:
- ]. a( ?8 ?/ O5 l S! Yother than the athlete taking a drug that the test is not designed to detect$ m# F, }2 z' i2 s
, anyone who has taken quantum 101 will tell you that everything is
& E2 X" S% h! I* \5 W5 Zprobabilistic in nature, and so there is a probability that the drug in an
) a$ }: u# g M. Q9 t' Wathlete’s system could tunnel out right at the moment of the test. A slight
4 i7 R) b1 j- A9 ~# ^chance it may be, but should we disregard all test results because of it?
5 o* _0 h+ ?' wLet’s be practical and reasonable, and accept that the World Anti-Doping
5 g. ~9 E- Y* p/ V5 d. J2 lagency (WADA) is competent at its job. Ye’s urine sample will be stored for
( Z2 A6 L# }# h9 Ieight years after the contest for future testing as technology advances.
( D0 x! U" K% q9 J1 m/ S/ I. }" _/ \Innocent until proven guilty, shouldn’t it be?. R+ r7 g4 I/ d
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Sixth, and the last point I would like to make, is that the out-of-
* b4 K: v& p, h9 i( N1 `competition drug test is already in effect, which Callaway failed to mention2 n' \+ N. s7 C: A: D2 ]" A: M6 d
. As noted in the president of WADA’s press release, drug testing for
& g3 D+ Q; ~' L6 X0 l" h6 KOlympians began at least six months before the opening of the London2 f5 F+ E W u: s
Olympics. Furthermore, 107 athletes have been banned from this Olympics for1 K, M+ m' ]- X/ e2 t7 Q% d0 U, `
doping. That may be the reason that “everyone will pass at the Olympic
3 @! J* G2 v- O" V: e! g. [games. Hardly anyone fails in competition testing” — those who did dope$ U, X, r& V6 d
have already been caught and sanctioned. Callaway is free to suggest that a# h1 U, B5 w) j7 S5 q
player could have doped beforehand and fooled the test at the game, but this
! e6 ^, T- x2 i& w" ~possibility is certainly ruled out for Ye.
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/ K0 ~8 @ I0 A, j' i0 p; ?2 ?Over all, even though Callaway did not falsify any data, he did (
5 F6 R5 c3 }* C3 u5 sintentionally or not) cherry-pick data that, in my view, are far too
- X9 u* [0 a- c! y. L; Osuggestive to be fair and unbiased. If you want to cover a story of a6 \2 C9 o* P* s5 }' }4 @) r, M: r
suspected doping from a scientific point of view, be impartial and provide/ F, ]8 b0 i$ j$ b9 P5 }: j' Z
all the facts for the reader to judge. You are entitled to your
- x, N5 E( C; B1 R( S" `' a/ iinterpretation of the facts, and the expression thereof in your piece,! v& T6 D/ e" e4 r+ a+ r- C' F+ [6 ]
explicitly or otherwise, but showing only evidence that favours your( m2 P( P5 p3 z% q0 V
argument is hardly good science or journalism. Such an article in a journal5 v; o& T! ~6 p" i
such as Nature is not an appropriate example of how scientific research or
W1 {: f8 B1 u8 r) preporting should be done. |
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