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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
: E7 {4 T1 s2 h, b& }1 ` r. H) g如果是中国长大的,英语能到这种程度真是很不简单。, Y/ t: X' F6 q" a3 \
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html! @5 l- ?5 R3 D" M
5 l0 Q( E) |. f) [( BFROM LAI JIANG, Department of Chemistry, University of Pennsylvania# Z# H8 Y1 m6 N* _3 ^# w k* S7 m
- K8 F8 S: o' m9 o, X6 @) @( sIt is a shame to see Nature — which nearly all scientists, including myself8 i+ d% ]% _- P
, regard as one of the most prestigious and influential physical-science: z' t5 N3 f* \" Y6 K; _! w
magazines — publish a thinly veiled biased article like this. Granted, this
/ c# X$ p5 S7 j$ B1 ^1 N3 _/ M( His not a peer-reviewed scientific article and did not go through the; l2 ]. F7 f) \, U
scrutiny of picking referees. But to serve as a channel for the general5 q! k" m# X6 F3 J+ K6 n) c$ p6 H- q
populace to be in touch with and appreciate science, the authors and editors
, W; B& i) A9 |& kshould at least present the readers with facts within the proper context,: F+ r$ X; k2 E8 w6 ~
which they blatantly failed to do.& {) J+ g, s+ b; p
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First, to identify Ye’s performance increase, Ewen Callaway compared her" O+ `7 U$ n% K9 F# n
Olympic 400-metre IM time with her performance at the World Championships in) O4 V# p) x( R) ]* X2 F. }, H
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
% S5 }& ~1 a' L0 @& \; F: uanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous! L" g1 C0 w4 @2 u* _" t( @' A3 {
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
7 q8 Y! X [# B, v' o% L0 N+ timprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
' i6 o2 H0 c4 m' K! Z: G4 jdifference between the gold and silver medal, I see no reason for 5.38 s to- M$ }9 X9 q) q X
be treated as 7 s.
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: ]( F2 l: b' C# }9 dSecond, as previously pointed out, Ye is only 16 years old and her body is5 k" B( {- R! p: z: n- `5 M: S
still developing. Bettering oneself by 5 seconds over two years may seem' g" x0 W& X5 m* Y0 |& R
impossible for an adult swimmer, but it certainly happens among youngsters.. v9 f" K) P% o) M1 _& }8 [ l2 y y
An interview with Australian gold medallist Ian Thorpe revealed that his 4005 R4 x# n6 Q5 v6 ~8 k+ Y
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.# F6 l0 Y% _9 S( x; @9 `5 Q8 l
For regular people, including Callaway, it may be hard to imagine what an) n( j/ l {1 J
elite swimmer can achieve as he or she matures and undergoes scientific and# a: f: D/ x( W
persistent training. But jumping to the conclusion that it is “anomalous”9 J; a, v: Y' j9 t# h5 T
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.) F' b7 `1 M( [+ c; U( M
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook$ G3 I1 |1 ]7 N+ R
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
: F8 ^2 h# w$ Zthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so( N; E/ f+ K& I
he chose not to push himself too hard and to conserve his energy for later
' h4 e. `5 T. D4 [1 |* u6 mevents (whether this conforms to the Olympic spirit and the ‘use one’s5 i; ?, ~/ j% u" G2 c/ ?/ j _
best efforts to win a match’ requirement that the Badminton World( m1 Y2 x1 T8 X7 O* J! ^
Federation recently invoked to disqualify four badminton pairs is another
0 F/ H% e7 S+ I" l- ttopic worth discussing, though probably not in Nature). Ye, on the other. h" I% i$ B! \
hand, was trailing behind after the first 300 metres and relied on freestyle
+ |% S, N# S9 b6 v. M: B' n9 |, in which she has an edge, to win the race. Failing to mention this
/ F, g; |9 L: L1 ] j8 y7 nstrategic difference, as well as the fact that Lochte is 23.25 seconds+ | d2 R8 B- A! J' H! V2 s$ J
faster (4:05.18) than Ye overall, creates the illusion that a woman swam0 d5 v8 T- t7 Q V1 R+ `' X. b
faster than the best man in the same sport, which sounds impossible. Putting
( _. V0 x8 N# s$ P baside the gender argument, I believe this is still a leading question that
) O' q' }5 j3 i( N$ I' V9 vimplies to the reader that there is something fishy going on.- \- U: d( {. c5 O- s
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Fourth is another example of cherry-picking. In the same event, there are
L S* W3 [2 M- [3 [+ L+ qfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.933 v- Z/ @4 W3 G' _
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
; T' T' x7 a( I- R0 V3 k), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
- t! r# h" o( ^8 zout, if we are just talking about the last 50 metres in a 400-metre IM,
9 a1 Y! N, Z: h# c$ b% q5 h8 ]Lochter is not the example I would have used if I were the author. What kind
, m+ o. l# [7 X% D4 W) Eof scientific rigorousness is Callaway trying to demonstrate here? Is it
- m/ ]7 G- i0 W/ llogical that if Lochter is the champion, we should assume that he leads in+ D7 E! j6 V! B: ?
every split? That would be a terrible way to teach the public how science
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
4 Q/ l% q8 i$ R6 Nimplies that a drug test cannot rule out the possibility of doping. Is this% r( h7 ^- X- M6 Q6 s
kind of agnosticism what Nature really wants to teach its readers? By that
& Z3 q' N0 ?# e% |: l2 estandard, I estimate that at least half of the peer-reviewed scientific
3 p/ X7 K) G/ }4 ?, |papers in Nature should be retracted. How can one convince the editors and0 Q, \0 l% e {, ~
reviewers that their proposed theory works for every possible case? One
3 I1 B7 c) y5 S4 c5 Tcannot. One chooses to apply the theory to typical examples and to1 B; t" H& C. I
demonstrate that in (hopefully) all scenarios considered, the theory works1 K2 |5 a2 M5 J$ Z9 C* B) c% u
to a degree, and that that should warrant publication until a counterexample
$ A+ s5 A: v& t, B3 [is found. I could imagine that Callaway has a sceptical mind, which is* g" L' [! }6 w: ]/ Z
crucial to scientific thinking, but that would be put to better use if he
" R2 C/ D# v# g# X, Q- |wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
2 m% h% D7 p6 l0 uadvanced, non-detectable drug that the Chinese have come up with in the
6 n7 `2 L& [3 |& H0 ^* K2 g1 Rpast 4 years (they obviously did not have it in Beijing, otherwise why not
4 W( W0 b& F, g! R1 ]" wuse it and woo the audience at home?), based on data and rational derivation
' W& }; S# F$ s. This article, however, can be interpreted as saying that all athletes are/ v# ]8 a" i& T. i, K$ H
doping and the authorities are just not good enough to catch them. That may
, k2 ?' I% R; M3 M) L$ C; e/ _" ube true, logically, but definitely will not make the case if there is ever a
6 E: p; T( {6 x1 fhearing by the governing body for water sports, FINA, to determine if Ye' Q( }% S& v7 g/ N
has doped. To ask whether it is possible to obtain a false negative in a5 u6 |+ C% j& a) l4 L
drug test looks like a rigged question to me. Of course it is possible:
4 M- D2 e9 _6 q7 d. sother than the athlete taking a drug that the test is not designed to detect7 B. q- p4 W/ i [' K# M. H \
, anyone who has taken quantum 101 will tell you that everything is [2 Q' z; B2 R! y1 }6 |
probabilistic in nature, and so there is a probability that the drug in an
: Y4 r4 D P/ }) p5 o4 t2 pathlete’s system could tunnel out right at the moment of the test. A slight
* D. [$ x0 A: i! Ochance it may be, but should we disregard all test results because of it?
: a4 A/ W6 M) WLet’s be practical and reasonable, and accept that the World Anti-Doping1 }% P& R8 J5 }. }
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
. J6 r/ p; _# R/ Veight years after the contest for future testing as technology advances./ c$ M& \& ^6 c9 \
Innocent until proven guilty, shouldn’t it be?
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H. j, {+ X4 FSixth, and the last point I would like to make, is that the out-of-
* D/ O: }/ s# Y7 [* Ccompetition drug test is already in effect, which Callaway failed to mention
7 t7 K& w) O9 a- l, G. As noted in the president of WADA’s press release, drug testing for
9 K4 y" M# V( i3 \( w jOlympians began at least six months before the opening of the London
! H' P4 D2 A1 ~1 y' L, ROlympics. Furthermore, 107 athletes have been banned from this Olympics for
& Y4 q6 I( N0 F% q; }, gdoping. That may be the reason that “everyone will pass at the Olympic
; _! ]; U. Q. N8 ugames. Hardly anyone fails in competition testing” — those who did dope, H* [2 z _7 ?: W1 ^! A0 N! [
have already been caught and sanctioned. Callaway is free to suggest that a0 N" d1 x4 @! ~$ e6 _
player could have doped beforehand and fooled the test at the game, but this
! X4 X9 s. ?) f- \possibility is certainly ruled out for Ye.9 O' v- B0 M1 K3 w% \& ]9 M7 q
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Over all, even though Callaway did not falsify any data, he did (* L* u# L; e; S/ r+ N. o' p
intentionally or not) cherry-pick data that, in my view, are far too
7 C5 N/ t& t( nsuggestive to be fair and unbiased. If you want to cover a story of a& Y# g7 E# `- Y9 X
suspected doping from a scientific point of view, be impartial and provide
; r$ |/ e4 I" s4 u5 W0 {all the facts for the reader to judge. You are entitled to your" V! a% C. e- Q/ P5 {2 p
interpretation of the facts, and the expression thereof in your piece,
1 J9 F! i' O7 h5 ^) lexplicitly or otherwise, but showing only evidence that favours your# ] Q( `& O. T$ H8 W7 L! f
argument is hardly good science or journalism. Such an article in a journal
$ \/ k7 f: C0 f& y6 S: lsuch as Nature is not an appropriate example of how scientific research or1 @+ Y) i( c' x3 l( V7 B
reporting should be done. |
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