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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; |, g9 B9 L m' X& y6 s& Y( G
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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, {$ a% m2 k3 I, @http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html" b H4 t# a) z/ z E1 y$ V
+ l: j6 \8 B5 ^4 I! q9 _FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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It is a shame to see Nature — which nearly all scientists, including myself
" f% u+ f0 J$ m6 R, regard as one of the most prestigious and influential physical-science% D5 s6 C8 x- e
magazines — publish a thinly veiled biased article like this. Granted, this( W: D- H7 Y& b' D6 b
is not a peer-reviewed scientific article and did not go through the1 h7 I+ x: y7 K0 h+ |! a' n# ?
scrutiny of picking referees. But to serve as a channel for the general. M$ |* t1 A5 w5 i& }
populace to be in touch with and appreciate science, the authors and editors: W7 x3 Q& ?) C' |- s& N
should at least present the readers with facts within the proper context,) {) p1 O& q% J/ a9 D- @
which they blatantly failed to do.2 R5 m! e! q* e2 p9 {8 B; ]( y7 x& f
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First, to identify Ye’s performance increase, Ewen Callaway compared her
* |0 j, o) N `" pOlympic 400-metre IM time with her performance at the World Championships in4 c! X2 P* c3 o) s4 ]. y
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
0 h- Y6 S8 P6 p) O: [7 m" M# Ganomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
9 u) d' D9 @6 ppersonal best was 4:33.79 at the Asian Games in 2010. This leads to an0 \ q; M ~: V# `4 o5 ?$ p* I. ?
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the+ j+ f L. K" `/ E& S
difference between the gold and silver medal, I see no reason for 5.38 s to
6 v! D2 v. m& W0 t, kbe treated as 7 s.) Y' B* p/ z5 b" ]
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Second, as previously pointed out, Ye is only 16 years old and her body is
]& x+ y/ w' H8 h* z ?still developing. Bettering oneself by 5 seconds over two years may seem- T% T& o! d8 c; V i3 G% G/ i
impossible for an adult swimmer, but it certainly happens among youngsters." D/ G8 o/ }& g6 r5 l/ H! Q. X/ z- E
An interview with Australian gold medallist Ian Thorpe revealed that his 400! w4 Y4 S; m8 c3 g$ O4 V
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
" ?- W5 K: O9 u% b$ P+ X. f1 @For regular people, including Callaway, it may be hard to imagine what an
8 r5 X. }1 ?5 @- I8 z# [+ j3 jelite swimmer can achieve as he or she matures and undergoes scientific and
, w6 N3 L- `% n" g. Cpersistent training. But jumping to the conclusion that it is “anomalous”
3 l5 h( z Q0 n9 z- a/ E- ?9 x4 jbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound./ c4 c' F# t2 T( \
% g3 }3 `% m: j7 ^3 d) K( e# NThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook- ?9 w5 }3 i- k v4 x( L
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in0 x q; R! |; n6 A1 ?8 g5 y
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
9 v) H: t7 f+ s1 {# [( P- ~he chose not to push himself too hard and to conserve his energy for later
& p$ L, f7 r$ uevents (whether this conforms to the Olympic spirit and the ‘use one’s
& }, h( q7 r3 ?1 h5 O3 G; }best efforts to win a match’ requirement that the Badminton World/ o l h% p! x7 v/ a& U8 n/ g
Federation recently invoked to disqualify four badminton pairs is another
0 q! Y2 T; _. A- ~; V3 Itopic worth discussing, though probably not in Nature). Ye, on the other
, j, t- s9 B2 m6 w0 A4 {1 m; Hhand, was trailing behind after the first 300 metres and relied on freestyle( J6 b% N$ Y6 b, |3 s
, in which she has an edge, to win the race. Failing to mention this
, v: d+ j0 e! t$ f# Y9 y4 dstrategic difference, as well as the fact that Lochte is 23.25 seconds
7 F9 I8 Y, _) u% xfaster (4:05.18) than Ye overall, creates the illusion that a woman swam: l+ X* U* {+ K* I4 A
faster than the best man in the same sport, which sounds impossible. Putting8 N( d7 r* M/ O9 ^( b
aside the gender argument, I believe this is still a leading question that% v# u: r; [( V' |, [
implies 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 are
9 W4 r" Q0 j( W2 gfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
2 p5 U2 _2 a5 Ws) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
: s+ B! |6 H$ E( ?5 Q* }), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns. n' G" |+ J4 @5 E1 s& f
out, if we are just talking about the last 50 metres in a 400-metre IM,. I2 E4 Z3 t# s' z' O+ E: h0 V0 u
Lochter is not the example I would have used if I were the author. What kind/ { i9 a. B& S! d. C' U: b
of scientific rigorousness is Callaway trying to demonstrate here? Is it
+ K" j7 J' ]( z; C; r0 ~& klogical that if Lochter is the champion, we should assume that he leads in
7 ]. M: e1 R0 J5 [every split? That would be a terrible way to teach the public how science& ] [- J$ ?: M4 ]
works./ h# C9 N! h: i1 ~1 W
! U4 d7 ~" V9 Z) s1 UFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
# Z7 Y9 O5 Z8 y* J0 C; Fimplies that a drug test cannot rule out the possibility of doping. Is this
! P9 G! ]6 s8 Tkind of agnosticism what Nature really wants to teach its readers? By that: C% q2 a+ r$ L' r s, e4 K& W
standard, I estimate that at least half of the peer-reviewed scientific
2 k% w$ Z2 G% c2 p/ x7 Fpapers in Nature should be retracted. How can one convince the editors and
/ ~. n" P4 h* k" u1 S) \, q& h" treviewers that their proposed theory works for every possible case? One z. K, t" V q7 K- }/ D" ^( `
cannot. One chooses to apply the theory to typical examples and to
# T9 H X' Z9 S$ k6 v9 j P' |$ tdemonstrate that in (hopefully) all scenarios considered, the theory works$ j g4 Y# o$ H* G
to a degree, and that that should warrant publication until a counterexample
* f5 L) j# P1 a$ A: U+ yis found. I could imagine that Callaway has a sceptical mind, which is' d% m2 }2 t5 L" K
crucial to scientific thinking, but that would be put to better use if he& b! q. N8 {/ p( ~7 [0 S
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
4 | c8 l& Y0 P; [9 P/ r5 ladvanced, non-detectable drug that the Chinese have come up with in the
5 H4 y, e: G- |past 4 years (they obviously did not have it in Beijing, otherwise why not
6 j4 o; z) {/ V+ l Nuse it and woo the audience at home?), based on data and rational derivation
2 B2 v, L% \' \+ V; t. This article, however, can be interpreted as saying that all athletes are3 _% d, u, d' \% l' b+ X" \* z
doping and the authorities are just not good enough to catch them. That may6 I! F5 N# S' r& F. D' I: m
be true, logically, but definitely will not make the case if there is ever a
( \( R% ~, x ]' \% h+ |/ Phearing by the governing body for water sports, FINA, to determine if Ye
# X+ y0 c$ ~$ Y( m U1 |has doped. To ask whether it is possible to obtain a false negative in a' M( r# q1 C" U# l# r: [4 w* q
drug test looks like a rigged question to me. Of course it is possible:
% k- u: F. Q3 x: o! l4 P, }5 N. eother than the athlete taking a drug that the test is not designed to detect
' a6 {& @- j1 |, anyone who has taken quantum 101 will tell you that everything is% ~* F$ ~5 ^2 ~3 t5 }! @4 e, _
probabilistic in nature, and so there is a probability that the drug in an
5 K- X$ q, p2 {( eathlete’s system could tunnel out right at the moment of the test. A slight
x$ Z$ f2 x) U5 n+ \chance it may be, but should we disregard all test results because of it? h* B: j+ e9 q5 Y9 P. c
Let’s be practical and reasonable, and accept that the World Anti-Doping) c6 r: D% D$ r% n! S/ i
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
8 I o& N3 _ leight years after the contest for future testing as technology advances.- T0 v# w) ~ U3 s# G
Innocent 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-
1 I- M) F0 u" D& L0 i% Z) m. ~* ocompetition drug test is already in effect, which Callaway failed to mention0 g$ }3 Z A8 r1 ^- k
. As noted in the president of WADA’s press release, drug testing for
" k K/ W- U" u y/ q$ aOlympians began at least six months before the opening of the London
% j4 C7 [" t5 W# w* H" U' cOlympics. Furthermore, 107 athletes have been banned from this Olympics for- k3 B% t" B) m3 l* \' p7 N v; n! D- F
doping. That may be the reason that “everyone will pass at the Olympic
3 ]9 I" D& j" n# H3 n& Ngames. Hardly anyone fails in competition testing” — those who did dope- s' }+ Z" N. ~: D
have already been caught and sanctioned. Callaway is free to suggest that a1 {8 w+ Y# @ l2 D6 T, v0 I
player could have doped beforehand and fooled the test at the game, but this! m1 h/ |" ~/ c) o5 `% T
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (0 p9 K9 j) F2 W9 }" D0 m% j
intentionally or not) cherry-pick data that, in my view, are far too
6 R% s4 R, I- C8 \suggestive to be fair and unbiased. If you want to cover a story of a* v* f5 k7 _* D0 \" H
suspected doping from a scientific point of view, be impartial and provide2 g, d) S8 Q( h3 u7 f
all the facts for the reader to judge. You are entitled to your
& H; J; q( L% J! f- b% s5 S7 ?interpretation of the facts, and the expression thereof in your piece,' ]; f" t" d" r9 v4 W' }. t6 [
explicitly or otherwise, but showing only evidence that favours your
N8 `# G; }/ |+ u. x+ O& Oargument is hardly good science or journalism. Such an article in a journal+ h4 d) C0 k5 n6 p2 H3 K5 R* _
such as Nature is not an appropriate example of how scientific research or
, V% _' k. F' b) B. Xreporting should be done. |
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