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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
$ P- R+ w: M' L$ b如果是中国长大的,英语能到这种程度真是很不简单。9 @6 n% l1 G4 |& b$ d
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html+ l# v' T' _4 j1 a% r( E: [% S
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania2 d3 t2 _2 x2 } c3 C8 f3 Y7 R
' S) ]/ W8 I( L; l4 X# wIt is a shame to see Nature — which nearly all scientists, including myself
8 c, L/ N; {4 e) z( `/ A, regard as one of the most prestigious and influential physical-science
+ s( E4 j/ f, mmagazines — publish a thinly veiled biased article like this. Granted, this: _8 ~0 r# w! U" Z% n' t0 E! S
is not a peer-reviewed scientific article and did not go through the
8 u$ r, ^* O) d. lscrutiny of picking referees. But to serve as a channel for the general
$ E$ h+ n, h1 C( B- Npopulace to be in touch with and appreciate science, the authors and editors' V0 k2 {) n3 ?& D) X6 ]
should at least present the readers with facts within the proper context,! T9 n6 s: u/ c
which they blatantly failed to do.) Z5 r" G( f, D A1 z
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First, to identify Ye’s performance increase, Ewen Callaway compared her) c/ \* {' |- l$ ~/ B# ~1 e
Olympic 400-metre IM time with her performance at the World Championships in! U! ]( W+ z, Z, c
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “8 m) |- u8 ?5 {% v: M: w
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
0 X, F/ t# m6 s$ s' Rpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an! L6 J; Z% u7 F5 h
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
; T( [- g# f6 {- U& Q' g* K; E0 D" Zdifference between the gold and silver medal, I see no reason for 5.38 s to% H0 |% C. e9 F
be treated as 7 s. ]3 J7 S; a1 x/ s( q8 A$ V* B6 G, }4 x
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Second, as previously pointed out, Ye is only 16 years old and her body is
9 _/ x5 m& k2 H& \3 \still developing. Bettering oneself by 5 seconds over two years may seem+ O2 i/ D! z% h7 ^" X
impossible for an adult swimmer, but it certainly happens among youngsters.
( X: [. D( Y, j( x/ oAn interview with Australian gold medallist Ian Thorpe revealed that his 400
# }) F+ K0 o9 a. Y ^ g-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
3 F) t& D6 U# G. Y7 TFor regular people, including Callaway, it may be hard to imagine what an
! P g9 g9 j& Kelite swimmer can achieve as he or she matures and undergoes scientific and
" f( }2 n. L6 Kpersistent training. But jumping to the conclusion that it is “anomalous”
; v0 L: x3 ~: Z: \$ G% @2 @# r4 Pbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.8 j4 y$ Y# \$ A" Z; v i
9 D- \# @7 W! eThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
' s: p a3 E" `5 D% `; N- mexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
% p$ ~ ]0 N9 G5 [the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
* O8 B. c# l- Z* {& Nhe chose not to push himself too hard and to conserve his energy for later! Z9 O( E, m% E* _; b
events (whether this conforms to the Olympic spirit and the ‘use one’s
! x o; d4 J( q0 `, Z- d Ybest efforts to win a match’ requirement that the Badminton World
' q# P& b A& d. q/ RFederation recently invoked to disqualify four badminton pairs is another& Y$ H8 H3 X$ n* Z0 O/ l- `" {
topic worth discussing, though probably not in Nature). Ye, on the other; ?$ C. Z5 d( q5 g! f
hand, was trailing behind after the first 300 metres and relied on freestyle6 W4 `2 H6 V% x% _4 z$ t2 @
, in which she has an edge, to win the race. Failing to mention this: R8 G6 h. g. A, k4 X
strategic difference, as well as the fact that Lochte is 23.25 seconds1 w) H) g+ [0 G8 r" l
faster (4:05.18) than Ye overall, creates the illusion that a woman swam" P( Z: f3 i) N6 }+ B% \8 {/ a
faster than the best man in the same sport, which sounds impossible. Putting
( o f6 H/ E; F R: a6 h/ Saside the gender argument, I believe this is still a leading question that$ ?, S ~. H" Q7 r
implies to the reader that there is something fishy going on.
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5 q2 y0 u1 _2 O2 CFourth is another example of cherry-picking. In the same event, there are
. y/ [) k9 \4 D* u6 |four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.936 p5 Q, {; M8 Z* ^
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
3 J- p) e/ d$ \2 B7 m), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
$ ]4 u' z( q0 d! Mout, if we are just talking about the last 50 metres in a 400-metre IM,5 ]% I5 ^; a- i: s2 u
Lochter is not the example I would have used if I were the author. What kind
! v! T: x: U' a7 ]; Iof scientific rigorousness is Callaway trying to demonstrate here? Is it
) _& H% i) M# e. k- L% vlogical that if Lochter is the champion, we should assume that he leads in
) e3 o' `8 X7 I* Q: xevery split? That would be a terrible way to teach the public how science
3 d7 ^& v8 V1 u; Xworks.9 i8 R/ I2 |9 k" w
/ H" h p5 \7 H9 eFifth is the issue I oppose the most. Callaway quotes Ross Tucker and1 x) `4 [5 H6 X2 `/ H9 _- s
implies that a drug test cannot rule out the possibility of doping. Is this4 G1 \- t+ x4 B4 A- L9 c
kind of agnosticism what Nature really wants to teach its readers? By that8 k8 m X6 c/ e+ _- D% `* u
standard, I estimate that at least half of the peer-reviewed scientific8 S3 s' [" o j3 e$ \% G( Q% j
papers in Nature should be retracted. How can one convince the editors and$ v6 d- ~+ h2 U [3 m% ^: c! v
reviewers that their proposed theory works for every possible case? One
5 l. X& E! [9 Y; d" ?cannot. One chooses to apply the theory to typical examples and to K$ ~7 X- E' \# J
demonstrate that in (hopefully) all scenarios considered, the theory works8 O) W- U9 U. T6 h ~4 K" }
to a degree, and that that should warrant publication until a counterexample
% Q6 T0 }5 l! U: xis found. I could imagine that Callaway has a sceptical mind, which is
& J7 a0 W4 I8 U6 b0 ?5 O# V7 Ccrucial to scientific thinking, but that would be put to better use if he
: g/ Z, N8 R4 zwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly, y O P, [( B1 y$ f
advanced, non-detectable drug that the Chinese have come up with in the" p4 A9 O( u% ]- g. t6 y% a) ]
past 4 years (they obviously did not have it in Beijing, otherwise why not
; D% j7 q6 Z B' P1 ^use it and woo the audience at home?), based on data and rational derivation+ C* [: M9 l# R+ @
. This article, however, can be interpreted as saying that all athletes are
9 [5 B* I0 z5 y: R& y, fdoping and the authorities are just not good enough to catch them. That may: d% s, ^+ ^$ ]- N1 ?
be true, logically, but definitely will not make the case if there is ever a
- _9 n- _8 l1 p& `/ Rhearing by the governing body for water sports, FINA, to determine if Ye5 {$ ?) q- j, A/ [# D) a( O# |" }
has doped. To ask whether it is possible to obtain a false negative in a
* L( \6 d |$ h. ]drug test looks like a rigged question to me. Of course it is possible:- S4 Y" ?4 q2 {
other than the athlete taking a drug that the test is not designed to detect7 Z6 v4 n, Z8 \- {1 B, H
, anyone who has taken quantum 101 will tell you that everything is
4 C, R7 k) u7 O8 l A( a) G, Wprobabilistic in nature, and so there is a probability that the drug in an: ?! F4 E5 m, c, B
athlete’s system could tunnel out right at the moment of the test. A slight
% S( d2 Y B. Z* d: I9 s/ _4 Ychance it may be, but should we disregard all test results because of it?, u' S, t3 c' S+ Q6 m; b& ]
Let’s be practical and reasonable, and accept that the World Anti-Doping' M9 ^& \, T, o% i
agency (WADA) is competent at its job. Ye’s urine sample will be stored for$ [# [) p4 ^& S; S$ D- {( p
eight years after the contest for future testing as technology advances.! p# d; z% [" J# a
Innocent until proven guilty, shouldn’t it be?' _2 H; x! |) @5 H6 X
1 v! S3 k, w- k0 s$ F' i- ESixth, and the last point I would like to make, is that the out-of-: ^" Z! }* B9 D7 E" }" V+ u
competition drug test is already in effect, which Callaway failed to mention
. d$ n4 E& h% D/ }, ?. As noted in the president of WADA’s press release, drug testing for% i: k8 w k% [" Y x
Olympians began at least six months before the opening of the London. W( E9 p7 `3 o& J1 i
Olympics. Furthermore, 107 athletes have been banned from this Olympics for* H3 r( h! W8 ?2 x! k) n) g
doping. That may be the reason that “everyone will pass at the Olympic
* @8 Z* f; q% Y. Fgames. Hardly anyone fails in competition testing” — those who did dope# ?& }% r$ m; s# A. Y/ B1 u
have already been caught and sanctioned. Callaway is free to suggest that a D4 E3 O0 w# H# n1 }% e7 G0 U
player could have doped beforehand and fooled the test at the game, but this
9 \* Y0 K- c1 C/ qpossibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
9 Z" ?. k$ ]" s" }5 T6 Gintentionally or not) cherry-pick data that, in my view, are far too
' E) w# d; b F4 k0 B! esuggestive to be fair and unbiased. If you want to cover a story of a
% u' U1 z: Z* w' P bsuspected doping from a scientific point of view, be impartial and provide$ K' f0 t+ p" W- z8 i
all the facts for the reader to judge. You are entitled to your
3 @ S3 x5 x9 J6 Y% O. Qinterpretation of the facts, and the expression thereof in your piece,
! B, @, l6 a: s( J: O$ t/ Wexplicitly or otherwise, but showing only evidence that favours your
9 t w# n; L# b) Aargument is hardly good science or journalism. Such an article in a journal
u" A/ I1 Y* Z& n: Y$ Usuch as Nature is not an appropriate example of how scientific research or2 |, r% N8 V1 X
reporting should be done. |
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