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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* Y' w7 k4 o
如果是中国长大的,英语能到这种程度真是很不简单。4 `5 M4 [# ~2 B+ C! S# {" i, |
0 d* P/ n/ l/ R2 shttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html! {) B9 f% ]/ M) P7 ~/ x
7 {) g+ a3 i4 {9 q6 w KFROM LAI JIANG, Department of Chemistry, University of Pennsylvania! u; F* n; j/ ]: ]8 E
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It is a shame to see Nature — which nearly all scientists, including myself! _( J: U* P, ~5 ?% k
, regard as one of the most prestigious and influential physical-science, M6 X. z. G3 I5 }
magazines — publish a thinly veiled biased article like this. Granted, this
& U" C* n- l- iis not a peer-reviewed scientific article and did not go through the! T/ t! I7 R7 z9 i# Q5 X
scrutiny of picking referees. But to serve as a channel for the general) h) P2 ~6 n0 e6 g% T5 s5 w; `
populace to be in touch with and appreciate science, the authors and editors
- ~5 C0 W, P- x4 g/ G9 r, gshould at least present the readers with facts within the proper context,
0 d: w" q+ H9 ^# v% K: Q9 Lwhich they blatantly failed to do.
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. C; z. `8 H! c0 l# o- n2 TFirst, to identify Ye’s performance increase, Ewen Callaway compared her
! n" V; B4 z. ?# v2 I( UOlympic 400-metre IM time with her performance at the World Championships in
! u' n$ c" ?) Y, f u& l2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “4 W4 x1 U/ G% N7 r; O
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous" T4 T. P- \0 t0 g; F) k
personal best was 4:33.79 at the Asian Games in 2010. This leads to an# W( G9 `* Z) @+ C5 |/ b( h8 D
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
9 s% A. `- t. ]difference between the gold and silver medal, I see no reason for 5.38 s to' f# W$ Y V2 K9 P, _
be treated as 7 s.
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+ A; @' i+ o$ {( x* U5 \5 jSecond, as previously pointed out, Ye is only 16 years old and her body is
$ ^" W( R( w- l9 v/ dstill developing. Bettering oneself by 5 seconds over two years may seem& H" B% W T0 T7 @
impossible for an adult swimmer, but it certainly happens among youngsters.% { L3 t- I7 d) k/ z- S) R
An interview with Australian gold medallist Ian Thorpe revealed that his 400+ [: n; d) _( ~
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
& M* n$ E2 i$ nFor regular people, including Callaway, it may be hard to imagine what an( Y3 [8 [9 C: r( k+ F. t0 r3 }
elite swimmer can achieve as he or she matures and undergoes scientific and5 T D5 H& L# L* \ K
persistent training. But jumping to the conclusion that it is “anomalous”
4 h7 h) {- w+ dbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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8 h5 w6 O# D! o% P; I4 W/ mThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook$ j0 `8 F( S g z
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in1 `' ~; ~$ D5 P( H
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so' t) L1 | L$ P4 A5 g
he chose not to push himself too hard and to conserve his energy for later
1 b3 g- p! A9 Z& U0 V0 O& Y' Jevents (whether this conforms to the Olympic spirit and the ‘use one’s% M' E* d+ J- K# _
best efforts to win a match’ requirement that the Badminton World
$ J# `: s/ }1 e5 MFederation recently invoked to disqualify four badminton pairs is another
|1 W3 {5 t. ]) Vtopic worth discussing, though probably not in Nature). Ye, on the other
, U( T( j1 a/ g2 fhand, was trailing behind after the first 300 metres and relied on freestyle" j, \$ A( c. S1 D+ U
, in which she has an edge, to win the race. Failing to mention this
7 g* h6 u7 f( P' E( U4 Kstrategic difference, as well as the fact that Lochte is 23.25 seconds3 K0 @ E' B& ?2 D4 M; O
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
& ^6 u: I, y' C. l9 W9 {: k( g5 Lfaster than the best man in the same sport, which sounds impossible. Putting3 v- @7 b+ n& x' S" J1 S
aside the gender argument, I believe this is still a leading question that
' f) i9 _: b( mimplies to the reader that there is something fishy going on.
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Fourth is another example of cherry-picking. In the same event, there are8 M1 D& [2 i5 [4 {: R
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
# D. S2 [- I& q" h E js) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s5 J: X/ ?3 h7 c( T% S4 P
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns4 x1 s4 }/ h* ~+ d6 s
out, if we are just talking about the last 50 metres in a 400-metre IM,
+ L0 | t2 r! `3 M9 oLochter is not the example I would have used if I were the author. What kind
+ {; d& q7 x1 E6 @+ ^) g6 bof scientific rigorousness is Callaway trying to demonstrate here? Is it
; y0 a& }5 f M& Z$ W9 c" wlogical that if Lochter is the champion, we should assume that he leads in
$ \+ t0 x8 H4 n2 u% v9 e( Yevery split? That would be a terrible way to teach the public how science( ?4 d7 T7 l/ l6 L Z T* @
works.) K! j: A; |. v' s9 b
# _: j+ S0 D8 [* ~% z1 \, b6 bFifth is the issue I oppose the most. Callaway quotes Ross Tucker and d0 Z- K' I& l8 K' B9 v
implies that a drug test cannot rule out the possibility of doping. Is this" `! k5 s1 C& E& T2 q* w4 v1 |( w
kind of agnosticism what Nature really wants to teach its readers? By that
F( b+ w. ]: nstandard, I estimate that at least half of the peer-reviewed scientific* E. m( m3 f; n; O; b
papers in Nature should be retracted. How can one convince the editors and
" H* |) k) M, b8 q# ~/ x' |reviewers that their proposed theory works for every possible case? One
8 R+ `% o) d0 E; W( \$ hcannot. One chooses to apply the theory to typical examples and to2 f9 U, f: b: `* N
demonstrate that in (hopefully) all scenarios considered, the theory works
8 k- `+ V- w* {2 Jto a degree, and that that should warrant publication until a counterexample+ s% q/ Z. X$ R8 D# A4 B
is found. I could imagine that Callaway has a sceptical mind, which is
# v3 j+ w% @ m7 T4 s- M5 w! V4 [crucial to scientific thinking, but that would be put to better use if he
2 M- L7 K$ H9 M! R( ewrote a peer-reviewed paper that discussed the odds of Ye doping on a highly- h! ]3 N% c, w- k9 d
advanced, non-detectable drug that the Chinese have come up with in the7 ?$ s$ R& J1 Q3 h/ D
past 4 years (they obviously did not have it in Beijing, otherwise why not: {& s' { M) t" V
use it and woo the audience at home?), based on data and rational derivation- M1 e; `3 i5 w3 N8 A% j2 a
. This article, however, can be interpreted as saying that all athletes are% W0 ^- w% _, [" D- k
doping and the authorities are just not good enough to catch them. That may
1 ]: T: \! K) P6 S7 C$ [2 F; Lbe true, logically, but definitely will not make the case if there is ever a" C5 V7 y/ y0 W; {1 h
hearing by the governing body for water sports, FINA, to determine if Ye2 X7 r/ P' a2 t$ \5 W$ _: s3 O
has doped. To ask whether it is possible to obtain a false negative in a* x9 `3 k f7 i( N7 c- R" f
drug test looks like a rigged question to me. Of course it is possible:5 b% z; n3 z8 M' a
other than the athlete taking a drug that the test is not designed to detect$ M+ c4 [" T, g$ P
, anyone who has taken quantum 101 will tell you that everything is
% F$ v) a9 {2 d+ s7 ?8 a3 wprobabilistic in nature, and so there is a probability that the drug in an
0 r$ w7 [0 U8 r! I6 S8 k0 y; n3 Eathlete’s system could tunnel out right at the moment of the test. A slight% y$ R& q T+ w1 ?& G
chance it may be, but should we disregard all test results because of it?, K/ z* | z" d0 q
Let’s be practical and reasonable, and accept that the World Anti-Doping% a# ?. E+ s' ^. y0 ~! R0 A
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
! W0 y0 g( v+ Yeight years after the contest for future testing as technology advances.
) u+ r: B- V- i5 c1 s# d0 ^Innocent until proven guilty, shouldn’t it be?" V2 z- p0 G; m+ t: j
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Sixth, and the last point I would like to make, is that the out-of-
, _' u# P. V0 e" Ecompetition drug test is already in effect, which Callaway failed to mention5 G! h0 W8 s( P+ F
. As noted in the president of WADA’s press release, drug testing for
+ g _& |4 h( h0 f7 f% dOlympians began at least six months before the opening of the London' y7 g5 J/ X6 u* U3 x: [7 i; Z' U9 K
Olympics. Furthermore, 107 athletes have been banned from this Olympics for( q( M5 Q9 f; F/ y
doping. That may be the reason that “everyone will pass at the Olympic
8 g0 K, q- Q. ? ygames. Hardly anyone fails in competition testing” — those who did dope2 W5 L# v* t J/ ?! a+ A
have already been caught and sanctioned. Callaway is free to suggest that a. a' e2 @( l1 N1 K, |6 d
player could have doped beforehand and fooled the test at the game, but this/ x9 \- V" A) J$ `/ `' `! ~
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (. x( G( u; H$ V: j
intentionally or not) cherry-pick data that, in my view, are far too4 C1 G J$ c. r3 r" ^: ?
suggestive to be fair and unbiased. If you want to cover a story of a
: L+ b" X* I( J6 Bsuspected doping from a scientific point of view, be impartial and provide9 e$ R- V; B& K4 w9 S8 C" p0 ?
all the facts for the reader to judge. You are entitled to your6 ]6 N8 F3 g- X, s1 h6 B3 @
interpretation of the facts, and the expression thereof in your piece,
- ~/ \; P9 G) f% L: t* l) i) Oexplicitly or otherwise, but showing only evidence that favours your
/ {2 e+ X6 P' ~, M1 ?argument is hardly good science or journalism. Such an article in a journal
* Z9 e* c# T2 b5 D* n( Jsuch as Nature is not an appropriate example of how scientific research or
) w. x# T2 T' E" _4 n* nreporting should be done. |
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