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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
# a9 N1 `# e& c6 F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.html6 m/ `& J: p% g
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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, r+ |! C6 ?0 g1 B- gIt is a shame to see Nature — which nearly all scientists, including myself9 S, q5 g5 w0 E& H2 r+ ^
, regard as one of the most prestigious and influential physical-science
4 s) x* w0 s! T+ rmagazines — publish a thinly veiled biased article like this. Granted, this
- q* x: S2 Z, A% A% l2 v6 Lis not a peer-reviewed scientific article and did not go through the2 |5 h8 X- g8 Y+ C- X
scrutiny of picking referees. But to serve as a channel for the general
2 O' e9 h- W, xpopulace to be in touch with and appreciate science, the authors and editors, F6 B5 T6 N* T% n
should at least present the readers with facts within the proper context,
5 r8 a5 `: r- h2 fwhich they blatantly failed to do.
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/ t: s1 m! ^" u$ G" P& gFirst, to identify Ye’s performance increase, Ewen Callaway compared her
7 }/ H8 h+ Z! H2 [) k, }5 kOlympic 400-metre IM time with her performance at the World Championships in& i5 [+ Y/ h+ |0 ^# P
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
9 ^. }: Y7 T Z1 {- [anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous9 Y2 `9 v' K( o( B, m. O
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
* m. o. J1 ?5 z4 \improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the' q9 E4 {) l/ S8 T
difference between the gold and silver medal, I see no reason for 5.38 s to6 S8 |4 {% K2 c9 G& |3 V/ |, [
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
' s) I0 C b1 a! n0 b- X( Bstill developing. Bettering oneself by 5 seconds over two years may seem
! T" a: K% L, Z6 t$ Uimpossible for an adult swimmer, but it certainly happens among youngsters.
: D0 M& n6 I; `% G) q+ |, |An interview with Australian gold medallist Ian Thorpe revealed that his 400
1 ]+ H0 ~& N. Y! t-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
- U; u" d6 Y1 O7 f. ^: XFor regular people, including Callaway, it may be hard to imagine what an, U1 d ]! i* F8 y7 s% ?7 Q
elite swimmer can achieve as he or she matures and undergoes scientific and& J( g& Z# R1 n o7 ?
persistent training. But jumping to the conclusion that it is “anomalous”
: C# `4 D+ u! W- d; W$ z- G9 ?* \based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook% A: Q" g! S1 B6 @+ E, {; Q/ J) L
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in0 p5 C. t! R5 }4 ^6 O4 o. H! z4 m- X1 L
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
' G4 q: H; d# D) V6 @he chose not to push himself too hard and to conserve his energy for later
4 I$ U+ J0 N; p3 ?* n% h& k2 r& p6 J9 _events (whether this conforms to the Olympic spirit and the ‘use one’s( k s; T1 ?7 m) l7 j0 o
best efforts to win a match’ requirement that the Badminton World; r9 Z! W1 d% h5 \' J( i& V
Federation recently invoked to disqualify four badminton pairs is another" G/ J4 T) v0 z; u
topic worth discussing, though probably not in Nature). Ye, on the other4 I5 m% |2 I! q% X$ @
hand, was trailing behind after the first 300 metres and relied on freestyle6 t' K* b- M/ M5 {7 [/ y
, in which she has an edge, to win the race. Failing to mention this
) O" B3 b1 f5 R$ B b& v# Dstrategic difference, as well as the fact that Lochte is 23.25 seconds8 \# C4 E9 @2 \* S
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
8 i8 e* m2 P6 _" xfaster than the best man in the same sport, which sounds impossible. Putting
, I% ~; W) M: {aside the gender argument, I believe this is still a leading question that" }- h( f h# ]) J) t0 L
implies to the reader that there is something fishy going on.
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; k* ?9 C) ^5 C; W3 X& D" UFourth is another example of cherry-picking. In the same event, there are+ A: ^! @* A+ ^9 w
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93+ q. q* O5 Q3 E9 C4 V
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
1 F* g# Q3 ~; Q7 o' \! ~), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns+ m. b9 C- J( C4 ^$ V& h' i5 D
out, if we are just talking about the last 50 metres in a 400-metre IM,
3 B; u J2 F% R! `3 R3 T) u2 N; lLochter is not the example I would have used if I were the author. What kind2 s9 q4 H! S6 ~5 n! \+ D
of scientific rigorousness is Callaway trying to demonstrate here? Is it
" @3 T1 Q% k+ r6 G4 _$ xlogical that if Lochter is the champion, we should assume that he leads in
9 l# [, F. H. Q) \/ N. q9 nevery split? That would be a terrible way to teach the public how science: S( ?( k" _$ l V+ `) ?
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
q+ U' k, I1 A- f# q! c: Z) c" q; yimplies that a drug test cannot rule out the possibility of doping. Is this
& {" y9 b0 B1 U2 Fkind of agnosticism what Nature really wants to teach its readers? By that
@8 [1 V5 B. ?standard, I estimate that at least half of the peer-reviewed scientific5 v9 {6 `) A7 Z& R0 B. a: X- d$ P
papers in Nature should be retracted. How can one convince the editors and# d7 D& W6 j' x M) M- p$ F, W
reviewers that their proposed theory works for every possible case? One
; t: Z2 u; A& {1 ^cannot. One chooses to apply the theory to typical examples and to) n" q/ n, G/ P- J4 P
demonstrate that in (hopefully) all scenarios considered, the theory works. o9 d# @: g: _0 j# G( I# ]
to a degree, and that that should warrant publication until a counterexample' e& y6 V' P4 q3 H
is found. I could imagine that Callaway has a sceptical mind, which is
( P- W: w M& f0 @* Bcrucial to scientific thinking, but that would be put to better use if he; W" P: h" X! _6 A
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly( E# u, m+ j& r# n
advanced, non-detectable drug that the Chinese have come up with in the
. H. Z3 \" l+ R3 |) h% Lpast 4 years (they obviously did not have it in Beijing, otherwise why not1 b6 u7 `& m$ r3 T! M
use it and woo the audience at home?), based on data and rational derivation! b( w" I$ w( X: p" W9 d$ Y
. This article, however, can be interpreted as saying that all athletes are4 J2 N1 i6 V/ R# _9 u" P% N- L
doping and the authorities are just not good enough to catch them. That may
6 |; a: {9 L" {) G$ q+ K4 H4 t1 Sbe true, logically, but definitely will not make the case if there is ever a5 Y' B- W( _! N N6 E
hearing by the governing body for water sports, FINA, to determine if Ye
7 q! p9 {+ o1 G3 k3 A2 ohas doped. To ask whether it is possible to obtain a false negative in a
' \5 {0 D; v vdrug test looks like a rigged question to me. Of course it is possible:
0 E$ X8 h6 @ F9 aother than the athlete taking a drug that the test is not designed to detect$ O0 O& I1 Q/ D; O2 G+ J+ Z% h
, anyone who has taken quantum 101 will tell you that everything is
' l( @! g5 R) c- L' z6 M# fprobabilistic in nature, and so there is a probability that the drug in an
4 k; t2 y: |" @& t/ ~1 iathlete’s system could tunnel out right at the moment of the test. A slight1 N8 @" V5 \1 k( `8 K( g3 Q1 n: c4 n
chance it may be, but should we disregard all test results because of it?
' c+ a- p$ @$ q# @3 [- d) `$ e1 LLet’s be practical and reasonable, and accept that the World Anti-Doping
9 H! E) D4 E; lagency (WADA) is competent at its job. Ye’s urine sample will be stored for9 R( B$ R( T( X& T9 r7 `6 B6 |
eight years after the contest for future testing as technology advances. m% F2 |7 Q. Q) [3 c% ]0 c
Innocent until proven guilty, shouldn’t it be?
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/ d3 h; u% o& N! J: SSixth, and the last point I would like to make, is that the out-of-
1 D' b1 l, {3 |: G8 Zcompetition drug test is already in effect, which Callaway failed to mention1 ~' A3 J# S0 i; V
. As noted in the president of WADA’s press release, drug testing for4 P+ I2 K3 t$ x. l
Olympians began at least six months before the opening of the London' j9 h( r, K- e* L# `- I
Olympics. Furthermore, 107 athletes have been banned from this Olympics for1 {- I0 W* ^: b3 v b/ B
doping. That may be the reason that “everyone will pass at the Olympic4 v" L! _. f1 y. U6 f0 T6 l- @
games. Hardly anyone fails in competition testing” — those who did dope
/ h2 f0 _8 }6 [3 x! X. |have already been caught and sanctioned. Callaway is free to suggest that a
9 E- w* y0 }" B9 A1 g" lplayer could have doped beforehand and fooled the test at the game, but this
! k6 t% Y0 I# _& ~* @possibility is certainly ruled out for Ye.
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+ x3 s4 `* ^0 F& eOver all, even though Callaway did not falsify any data, he did (
9 y9 a4 O# v1 w8 } y" K. Yintentionally or not) cherry-pick data that, in my view, are far too& Y: u# p. I4 Z" D
suggestive to be fair and unbiased. If you want to cover a story of a& l1 S1 I7 G8 o* [* l# c6 @7 V! U+ @
suspected doping from a scientific point of view, be impartial and provide" o9 Q r1 }4 \! J4 q: \) Y7 W
all the facts for the reader to judge. You are entitled to your6 l% [% {5 A3 |( @
interpretation of the facts, and the expression thereof in your piece,
. D+ i8 O) u/ P& e; [explicitly or otherwise, but showing only evidence that favours your U9 }7 d' q e X
argument is hardly good science or journalism. Such an article in a journal
( e: @4 Z4 x5 F& M8 W" `0 osuch as Nature is not an appropriate example of how scientific research or
8 H) m2 s$ L% k9 [reporting should be done. |
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