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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
% i/ L; c! S# J: S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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- J3 g& s( I8 r! p |4 [0 C3 vhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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1 F, ]+ E4 N4 }9 M3 X6 Q1 \5 QFROM LAI JIANG, Department of Chemistry, University of Pennsylvania, @2 V- X d' V* }, A; m: T
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It is a shame to see Nature — which nearly all scientists, including myself( r# H; o- P+ d6 n/ m R4 S
, regard as one of the most prestigious and influential physical-science
4 i- M* V% E, e$ o) k! w% n8 pmagazines — publish a thinly veiled biased article like this. Granted, this* O/ e& V# G: _
is not a peer-reviewed scientific article and did not go through the
( C! {" ^0 v* @8 o# iscrutiny of picking referees. But to serve as a channel for the general# K, P/ Y; [4 S6 E/ k& N: B
populace to be in touch with and appreciate science, the authors and editors
2 z9 v, `$ i4 ` J# P( r2 `should at least present the readers with facts within the proper context," C# K! C; `" u" r$ U8 ]
which they blatantly failed to do.( q1 [+ `+ ?5 ?. ]
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First, to identify Ye’s performance increase, Ewen Callaway compared her4 i) J2 c$ I+ r$ |
Olympic 400-metre IM time with her performance at the World Championships in
8 x8 Q! \0 r4 H4 s6 s2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “6 ^* d u3 e4 V2 q& H
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous5 A* ^% G0 ]* I
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
( I" w" a$ B2 l ?improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
+ O6 S6 s5 j1 adifference between the gold and silver medal, I see no reason for 5.38 s to
% d1 W. M' J) o$ p m& Kbe treated as 7 s.
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$ _, \: A+ `& a; x/ aSecond, as previously pointed out, Ye is only 16 years old and her body is/ s E& b! z1 B
still developing. Bettering oneself by 5 seconds over two years may seem3 A- A* o* [" W$ d0 o P! J
impossible for an adult swimmer, but it certainly happens among youngsters.
- Y( H, [9 d0 s9 AAn interview with Australian gold medallist Ian Thorpe revealed that his 400
& h0 Q% t" d! |/ B-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
# x) }$ a3 V% _3 X0 RFor regular people, including Callaway, it may be hard to imagine what an/ F& C8 X) H. h: d" e7 o
elite swimmer can achieve as he or she matures and undergoes scientific and7 I- B( X+ }3 b4 k+ R
persistent training. But jumping to the conclusion that it is “anomalous”9 F1 O" U4 T, l4 I. l2 c1 L
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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/ X0 E4 d8 {- [4 \; B7 }Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
/ z8 l" b, B( V' t0 f% zexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in* z4 y; i* S# B: [& Z" T4 j0 p
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
0 F8 C" p5 b: r: dhe chose not to push himself too hard and to conserve his energy for later
# x. i9 B: X+ F' O2 l% devents (whether this conforms to the Olympic spirit and the ‘use one’s
7 G7 W: [7 p8 C6 m, A5 x* J4 Jbest efforts to win a match’ requirement that the Badminton World
$ X0 Y1 T+ O) ^, k# U$ P- pFederation recently invoked to disqualify four badminton pairs is another& }' p# l. O- \% a- Z
topic worth discussing, though probably not in Nature). Ye, on the other
8 s. ?" D0 F: r9 ?0 ~4 ^hand, was trailing behind after the first 300 metres and relied on freestyle, R4 |9 f# T, R" E% g
, in which she has an edge, to win the race. Failing to mention this: j4 q q6 C8 E, Y$ b
strategic difference, as well as the fact that Lochte is 23.25 seconds
5 U, N7 S- ^% j2 P8 vfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
& f" D- |6 ~2 N3 |* ufaster than the best man in the same sport, which sounds impossible. Putting, X( i4 {, l$ X& {5 T
aside the gender argument, I believe this is still a leading question that
]$ W8 |7 n0 c. Fimplies 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
2 {+ V6 p N3 T# f$ r e3 [. n' qfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93) c* J9 q6 K9 N3 y
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
8 {% d% ?8 }3 ~! r% s% x+ v), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
1 M) i2 q K0 Z/ Iout, if we are just talking about the last 50 metres in a 400-metre IM,, \' i. G4 a0 G
Lochter is not the example I would have used if I were the author. What kind: V# v' G: i. Z: j7 g5 ]. n
of scientific rigorousness is Callaway trying to demonstrate here? Is it
+ \8 Z+ S. g; Y8 Y3 l* Ilogical that if Lochter is the champion, we should assume that he leads in T: ]2 t, t2 [1 J0 y. `6 e
every split? That would be a terrible way to teach the public how science! S& B% [) k) }
works.1 ?6 c8 Y6 H3 b0 Y8 W* ?8 R2 Z
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
. V0 ^# r$ x% C5 X* Y+ ~( X! Kimplies that a drug test cannot rule out the possibility of doping. Is this
) f& `# }% ^0 Y+ i3 bkind of agnosticism what Nature really wants to teach its readers? By that' q1 A- B2 D7 z: j" s9 D) v
standard, I estimate that at least half of the peer-reviewed scientific$ P& y, o0 G# O0 o g
papers in Nature should be retracted. How can one convince the editors and. i! a$ z, h0 i& x8 b1 y
reviewers that their proposed theory works for every possible case? One
. I% I7 i. w7 t/ a+ rcannot. One chooses to apply the theory to typical examples and to, q9 A$ Z) \" t' i6 J5 J- f1 g% g
demonstrate that in (hopefully) all scenarios considered, the theory works; O! Y- f/ q* V- y) S" c( X2 m1 K4 {
to a degree, and that that should warrant publication until a counterexample( W3 i/ ^" M Q- t) B) {8 Y
is found. I could imagine that Callaway has a sceptical mind, which is# E3 s% P, h% D
crucial to scientific thinking, but that would be put to better use if he6 O6 l' W) x# N) y6 C$ ?
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly) X j9 j8 `, P2 {
advanced, non-detectable drug that the Chinese have come up with in the
5 X7 A5 y' [# `4 _" spast 4 years (they obviously did not have it in Beijing, otherwise why not
; L; i# T3 E% C' p( i: zuse it and woo the audience at home?), based on data and rational derivation9 H! l( q1 M* |% f( N- d0 ]5 w
. This article, however, can be interpreted as saying that all athletes are4 i% L. R9 D8 R8 `$ W
doping and the authorities are just not good enough to catch them. That may
J7 v1 W1 }1 `- Gbe true, logically, but definitely will not make the case if there is ever a. q1 W. K, K9 E; \' u5 t# I# Y
hearing by the governing body for water sports, FINA, to determine if Ye
+ l5 ^) `' l1 h8 _5 ?has doped. To ask whether it is possible to obtain a false negative in a4 R: c6 k3 Y0 U* r6 Q8 l& E
drug test looks like a rigged question to me. Of course it is possible:" p: D3 T' H4 ~7 H- L3 @6 R2 I
other than the athlete taking a drug that the test is not designed to detect- g8 ]) o/ R# d( U8 ^: ~' _* q
, anyone who has taken quantum 101 will tell you that everything is
* |/ |0 z" L# B2 ^: a& p8 vprobabilistic in nature, and so there is a probability that the drug in an
7 V. ]- t2 D4 Q! l# O! Vathlete’s system could tunnel out right at the moment of the test. A slight
* e9 P& e0 ?( X1 `: W8 zchance it may be, but should we disregard all test results because of it?
) Z4 y& l; ?$ D( f9 X8 A6 WLet’s be practical and reasonable, and accept that the World Anti-Doping0 i( i( `+ C+ s. _! R
agency (WADA) is competent at its job. Ye’s urine sample will be stored for& A$ ?/ D$ d0 T- R5 k+ s
eight years after the contest for future testing as technology advances.
; w. a3 F$ Z" i3 w# \- X7 ~Innocent until proven guilty, shouldn’t it be?; B) Z0 m: y8 _7 F" ^, F
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Sixth, and the last point I would like to make, is that the out-of-
( k/ Q ~8 s& ^- H7 ccompetition drug test is already in effect, which Callaway failed to mention
. I1 D) m7 B/ |9 Z; }& y. As noted in the president of WADA’s press release, drug testing for9 z+ e+ L7 O' J% j8 `( S
Olympians began at least six months before the opening of the London3 g6 n1 v# ^; ]1 I+ s3 w
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
2 }! X: {$ v b% m/ X, cdoping. That may be the reason that “everyone will pass at the Olympic0 H, M) ~/ I6 U+ } c9 v, X, L
games. Hardly anyone fails in competition testing” — those who did dope
" `! ?% r& v* i( ^. mhave already been caught and sanctioned. Callaway is free to suggest that a$ N7 k1 s% a/ @; u( a5 i6 F g
player could have doped beforehand and fooled the test at the game, but this
+ Q. `5 C3 B7 D7 t* F6 v% Kpossibility is certainly ruled out for Ye.% W; [4 G( l$ J- Z! i7 F/ ? O1 ~5 S
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Over all, even though Callaway did not falsify any data, he did (
3 e7 U0 h1 ~5 S- ~- n* p& i$ \intentionally or not) cherry-pick data that, in my view, are far too/ B) z1 v0 f$ d9 L! | c
suggestive to be fair and unbiased. If you want to cover a story of a) \4 y L: d6 N
suspected doping from a scientific point of view, be impartial and provide
$ s8 L; E' d( p( K" o, oall the facts for the reader to judge. You are entitled to your
- y$ n+ F- s' Q- k, P0 I# M: ~9 ^interpretation of the facts, and the expression thereof in your piece,: V3 ^& G' K2 A4 {& }
explicitly or otherwise, but showing only evidence that favours your' Y' c1 I6 n6 ?) \8 k( v
argument is hardly good science or journalism. Such an article in a journal& o, n2 ?, {- W5 p
such as Nature is not an appropriate example of how scientific research or
. m g3 K: q2 Q9 X6 O) S J% O6 Creporting should be done. |
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