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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, a8 |6 Y8 w3 g& [6 n: D
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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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html& }2 k6 b5 i6 d, Z3 ], L
7 K/ I" l/ e) k9 XFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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7 L. q0 F, T8 S" M: O5 V DIt is a shame to see Nature — which nearly all scientists, including myself
! ?/ \6 r: I* A, regard as one of the most prestigious and influential physical-science
3 y# c7 Y4 V+ D" M* z" b6 P+ Tmagazines — publish a thinly veiled biased article like this. Granted, this
! i+ H! D- r4 s3 s# Cis not a peer-reviewed scientific article and did not go through the _4 e0 v2 G/ k( s9 t0 J# c
scrutiny of picking referees. But to serve as a channel for the general' q4 V: l2 E2 k2 ?
populace to be in touch with and appreciate science, the authors and editors
+ m/ @3 h8 w9 f' hshould at least present the readers with facts within the proper context,
6 |( z4 W4 X8 G8 X, s+ r' @& E7 dwhich they blatantly failed to do.
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/ s+ w* D0 v `First, to identify Ye’s performance increase, Ewen Callaway compared her+ n, Q9 {! c' X- G, R$ s
Olympic 400-metre IM time with her performance at the World Championships in
7 u2 v! b. M- f ]8 V& s2 L& D2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “# r& K) B, `. D; {7 \$ h
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous9 {3 z7 T! ?) u. U# x
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
" }: `4 p4 H' G* h, bimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the8 ?0 N/ q8 P( _) ~2 [) u( T7 T
difference between the gold and silver medal, I see no reason for 5.38 s to& e- m6 }3 d3 j( G) V0 ?
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
2 U4 V5 o) K/ O7 r3 g, _& f6 t0 Sstill developing. Bettering oneself by 5 seconds over two years may seem
* {$ {- j3 B w9 R8 w' pimpossible for an adult swimmer, but it certainly happens among youngsters.6 ]& t$ s! K6 e3 m/ S7 v. m! s. q
An interview with Australian gold medallist Ian Thorpe revealed that his 400
& M5 s. f1 g: ~8 y-metre freestyle time improved by 5 seconds between the ages of 15 and 16.* ]- N0 X$ [4 t3 ~
For regular people, including Callaway, it may be hard to imagine what an/ A4 l: Y0 r: A" ^* W; A; x
elite swimmer can achieve as he or she matures and undergoes scientific and }4 Q) `0 T' Z& M6 o f
persistent training. But jumping to the conclusion that it is “anomalous”
) |. \8 d, s$ C. ~: Z3 x1 rbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.! n) [: `+ H$ \. E
& H8 U5 ~. {+ E0 RThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook% G' e* A" m5 r" w* F) W4 n* V
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in, r: j. @: j4 n0 ~/ Y
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
5 A- m" ?1 o% ?- k0 Xhe chose not to push himself too hard and to conserve his energy for later' j0 E% X2 [$ G! P' r7 I; Z) ?$ t
events (whether this conforms to the Olympic spirit and the ‘use one’s
7 m0 T' C4 v- e' D) p( \; Gbest efforts to win a match’ requirement that the Badminton World
. I2 |) T) I( j& E; g9 UFederation recently invoked to disqualify four badminton pairs is another
1 w% U) P, D! h4 r9 ftopic worth discussing, though probably not in Nature). Ye, on the other
- }% z% V% S* o2 @hand, was trailing behind after the first 300 metres and relied on freestyle
$ P, L" ^/ [! @: n+ x/ B; e5 z" f, in which she has an edge, to win the race. Failing to mention this
- |/ U, c! R# bstrategic difference, as well as the fact that Lochte is 23.25 seconds
* d, b8 {, R6 e: C6 `, {4 O$ p( \faster (4:05.18) than Ye overall, creates the illusion that a woman swam. Y6 L+ W8 s/ `3 h
faster than the best man in the same sport, which sounds impossible. Putting
' b# C0 R |* K3 Y. waside the gender argument, I believe this is still a leading question that) T f N7 z+ l, G) q3 J! u8 m& G& O0 q1 Y
implies to the reader that there is something fishy going on.+ T( g+ E: x7 u& T) `; Q7 }
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Fourth is another example of cherry-picking. In the same event, there are
) W' t) m6 s; S& F5 n& L% \* b& X+ }four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.931 K6 e% }9 }" z! q2 Z+ e
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s/ [4 k3 k, ~* S" o
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
% s9 ~, s" s+ `9 H" Bout, if we are just talking about the last 50 metres in a 400-metre IM,/ e# s& F$ w$ `$ M# t' `* l$ T
Lochter is not the example I would have used if I were the author. What kind
2 D+ _! |2 b' D$ [- {* L5 [of scientific rigorousness is Callaway trying to demonstrate here? Is it
% r0 } P, q8 G" a/ ylogical that if Lochter is the champion, we should assume that he leads in4 v% v. \4 u/ y+ a
every split? That would be a terrible way to teach the public how science
! J2 `' ~9 o2 t t/ N# [% qworks.
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8 S9 ]( c1 u) u Y$ WFifth is the issue I oppose the most. Callaway quotes Ross Tucker and) @# v H2 |. a+ j8 n Q
implies that a drug test cannot rule out the possibility of doping. Is this- v0 u: W+ g# Y! w9 {9 F
kind of agnosticism what Nature really wants to teach its readers? By that
# ]# J+ h W& G$ ^4 W# lstandard, I estimate that at least half of the peer-reviewed scientific3 |- e+ [" c T2 I: _1 b/ Q5 o3 ?
papers in Nature should be retracted. How can one convince the editors and
4 T5 r# p! W9 X3 u9 }' Mreviewers that their proposed theory works for every possible case? One
2 X r5 S6 z0 O" k. L ocannot. One chooses to apply the theory to typical examples and to4 K, m1 v4 G6 u# X
demonstrate that in (hopefully) all scenarios considered, the theory works3 p8 c5 d) s! n
to a degree, and that that should warrant publication until a counterexample- w) O, Z% q+ C% r
is found. I could imagine that Callaway has a sceptical mind, which is
7 A' L' L# X9 lcrucial to scientific thinking, but that would be put to better use if he1 Y1 W' G; _( z% o# X1 f: K6 o5 v
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
9 {$ }2 _( X$ Q) {+ Y0 I5 T" n a6 F( P9 oadvanced, non-detectable drug that the Chinese have come up with in the
0 C% Z% q4 c# K/ Apast 4 years (they obviously did not have it in Beijing, otherwise why not2 g$ h v8 n! P2 W# s
use it and woo the audience at home?), based on data and rational derivation* v0 q" \/ {/ `7 k2 v- l
. This article, however, can be interpreted as saying that all athletes are( e- G6 K- [( C9 {; a' B5 Q h# X
doping and the authorities are just not good enough to catch them. That may$ y5 p* B z) x) V- |: @4 C
be true, logically, but definitely will not make the case if there is ever a: _+ T w; f' |" K& ~
hearing by the governing body for water sports, FINA, to determine if Ye' D: s* p5 r; ` B
has doped. To ask whether it is possible to obtain a false negative in a
8 I8 q' k8 W: F4 {* U+ A" C8 qdrug test looks like a rigged question to me. Of course it is possible:+ M( }4 b: i |. }
other than the athlete taking a drug that the test is not designed to detect
. B# D& u5 H" @* P9 @, anyone who has taken quantum 101 will tell you that everything is* n: U7 L- A+ O' n$ k
probabilistic in nature, and so there is a probability that the drug in an
' c! S8 j, k. A8 U" I# Iathlete’s system could tunnel out right at the moment of the test. A slight
4 y3 L2 E' q: B# l1 E2 rchance it may be, but should we disregard all test results because of it?
4 j; j; ]: a8 E! \" DLet’s be practical and reasonable, and accept that the World Anti-Doping
+ s. D9 n/ a6 j% z8 }, bagency (WADA) is competent at its job. Ye’s urine sample will be stored for9 a. A+ q+ q) @1 `* k7 r0 {
eight years after the contest for future testing as technology advances.
?. ^: w) @! gInnocent until proven guilty, shouldn’t it be?
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Sixth, and the last point I would like to make, is that the out-of-/ G- Z& n( r$ Q1 m F
competition drug test is already in effect, which Callaway failed to mention
4 @) B N+ ~/ {: _. As noted in the president of WADA’s press release, drug testing for2 K. X4 r4 w/ |' B8 `3 ]
Olympians began at least six months before the opening of the London; k$ U* f! V* |; R$ ?4 f: J) Q; l6 Q: j
Olympics. Furthermore, 107 athletes have been banned from this Olympics for- k, a5 j( P0 I- s2 i4 _
doping. That may be the reason that “everyone will pass at the Olympic
- A" Y; f3 r) |" m+ Sgames. Hardly anyone fails in competition testing” — those who did dope
6 G+ T% d. K0 U* a- k5 ghave already been caught and sanctioned. Callaway is free to suggest that a1 K* m+ h8 T! d/ G( Y% x9 N
player could have doped beforehand and fooled the test at the game, but this4 v1 a. p" t5 L" \7 `
possibility is certainly ruled out for Ye.
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# f/ k2 k( _, ]- _* j: B5 T' rOver all, even though Callaway did not falsify any data, he did (
0 V; H! x- a! X* ^/ H; `' `intentionally or not) cherry-pick data that, in my view, are far too4 e w6 i8 G$ b$ g8 f4 h
suggestive to be fair and unbiased. If you want to cover a story of a0 {. D6 I( Z8 x( ] Q% a1 s
suspected doping from a scientific point of view, be impartial and provide
3 |& g2 I: ^$ J2 j) r5 Eall the facts for the reader to judge. You are entitled to your! D7 Z" X" }7 }9 x2 r
interpretation of the facts, and the expression thereof in your piece,* g2 N2 w# }& I% v; e1 v; L0 k
explicitly or otherwise, but showing only evidence that favours your
" @* n8 \2 `. y3 _2 {argument is hardly good science or journalism. Such an article in a journal( R" W3 j& V4 D& y/ l' u) |$ e
such as Nature is not an appropriate example of how scientific research or
2 y3 Y5 S# B0 K: ~/ Q( Wreporting should be done. |
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