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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$ R0 F1 t/ P& z9 w1 k
如果是中国长大的,英语能到这种程度真是很不简单。' e' z# W+ i! W: H' k2 X+ i
! l5 |* p4 Q x* E1 Khttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania C7 |$ h0 k! b9 S6 S) f9 c
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It is a shame to see Nature — which nearly all scientists, including myself
2 x1 L8 P8 _0 s8 c, regard as one of the most prestigious and influential physical-science
* f) F: o( N) C+ I$ j# ~& j' cmagazines — publish a thinly veiled biased article like this. Granted, this- X4 C/ m. G5 [; Z1 W) u' C
is not a peer-reviewed scientific article and did not go through the% u( e! e9 q0 m! N
scrutiny of picking referees. But to serve as a channel for the general& E6 ?9 P2 L5 _* _
populace to be in touch with and appreciate science, the authors and editors
* e1 m, w& n$ t& D9 E& W6 C' `% i" Sshould at least present the readers with facts within the proper context,7 u' n& \* r% e- W T
which they blatantly failed to do.0 q, j! D; P" z/ ]
3 g; d E1 P5 {0 S( C5 y& R3 zFirst, to identify Ye’s performance increase, Ewen Callaway compared her
2 G l" u% ], G6 `0 p7 g( c+ B4 L+ TOlympic 400-metre IM time with her performance at the World Championships in
4 K/ O8 T# [& y( x$ m$ ?- u2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “ n3 `' }+ f' i/ R2 O+ k& @
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous5 [6 e$ N9 u% ~& P
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
- T+ [0 L& E( t* w" ~' t; u N/ v" F7 _improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
6 ^/ {7 Q: W) kdifference between the gold and silver medal, I see no reason for 5.38 s to
6 K$ G- o! d% ?5 @be treated as 7 s." R0 ~" E' {9 w7 S- [) ^8 a
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Second, as previously pointed out, Ye is only 16 years old and her body is) J: ^5 V! k+ h! B8 n
still developing. Bettering oneself by 5 seconds over two years may seem4 S6 Q% b. K1 L$ _2 {
impossible for an adult swimmer, but it certainly happens among youngsters.
+ N9 v, P* J2 c3 ~6 A- gAn interview with Australian gold medallist Ian Thorpe revealed that his 400
; G9 U* \; L0 l% [-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
8 _: W. G: K) n& OFor regular people, including Callaway, it may be hard to imagine what an4 q1 E- w1 M" o" W
elite swimmer can achieve as he or she matures and undergoes scientific and
9 a2 Q* v; y3 l5 J, U! fpersistent training. But jumping to the conclusion that it is “anomalous”! e, p5 Q# w6 S5 M5 B
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.. X5 J' @+ e7 j$ z
: G2 e* k" _0 y7 aThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
8 c& T+ ?$ y: h$ Cexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in0 y/ i5 W( A1 `0 J
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so4 c7 N ?9 K3 v( p) e
he chose not to push himself too hard and to conserve his energy for later
, e3 h3 q: H! f0 ?: {; aevents (whether this conforms to the Olympic spirit and the ‘use one’s& y$ p+ X- ]2 G
best efforts to win a match’ requirement that the Badminton World$ n* Y' } l* h6 K8 ^0 L7 i) }
Federation recently invoked to disqualify four badminton pairs is another
0 Y* C% t6 x3 u+ L5 T+ s, Qtopic worth discussing, though probably not in Nature). Ye, on the other$ T# Z, W; @: u0 V" k/ C: A
hand, was trailing behind after the first 300 metres and relied on freestyle
3 g! r0 p Q2 {3 j( V) @0 T1 h" {; {, in which she has an edge, to win the race. Failing to mention this2 ?" O3 Y6 S, b
strategic difference, as well as the fact that Lochte is 23.25 seconds
- Z6 M! E+ n# j4 u' dfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
( ^5 w) P- j1 D( f7 Sfaster than the best man in the same sport, which sounds impossible. Putting
9 h, G* {0 ?6 taside the gender argument, I believe this is still a leading question that: w* p4 T( n" j$ r& ~% ~3 X' |2 E% o- E5 b
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
" u+ N6 P& q% Jfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.935 T& P$ T0 @$ o. H( Q
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
. E4 h; H1 N N7 d), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns( l4 x& m( U+ F2 Q P2 o# w
out, if we are just talking about the last 50 metres in a 400-metre IM,
$ E* s6 G7 V7 h; {! D+ pLochter is not the example I would have used if I were the author. What kind" g. L% b) W9 Z2 M1 s- K
of scientific rigorousness is Callaway trying to demonstrate here? Is it
! P" { ]/ }1 {8 i! S' ^logical that if Lochter is the champion, we should assume that he leads in
+ P8 l# p0 v1 u+ L; ]every split? That would be a terrible way to teach the public how science9 o+ b7 n& A; v+ @* ~7 |: L
works.
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! l! {$ f* c( j& E1 E; eFifth is the issue I oppose the most. Callaway quotes Ross Tucker and5 J/ `! K4 ?6 R2 X" r4 ]. P
implies that a drug test cannot rule out the possibility of doping. Is this: D8 [& c4 l6 k, n% a% |* X1 v
kind of agnosticism what Nature really wants to teach its readers? By that3 k/ U5 m" p3 H2 _" j
standard, I estimate that at least half of the peer-reviewed scientific8 z+ C1 n/ |. d' Q
papers in Nature should be retracted. How can one convince the editors and
8 e; s W6 F4 m& {3 [7 R& Vreviewers that their proposed theory works for every possible case? One* S/ E$ {' }0 j+ V$ g. R( Z
cannot. One chooses to apply the theory to typical examples and to9 o1 ~* S. a* A
demonstrate that in (hopefully) all scenarios considered, the theory works+ H, Z( \0 y2 E, j
to a degree, and that that should warrant publication until a counterexample6 _+ [9 \7 d G
is found. I could imagine that Callaway has a sceptical mind, which is( {3 E+ C9 }: Q( Z3 B
crucial to scientific thinking, but that would be put to better use if he
7 w. }9 H1 T2 F- }wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
$ c" _/ ?- ^2 ?2 W9 |; F# n" V6 Dadvanced, non-detectable drug that the Chinese have come up with in the
0 w. Q0 L) r3 [7 E% npast 4 years (they obviously did not have it in Beijing, otherwise why not& D5 `0 k$ d2 Z; G' V7 r
use it and woo the audience at home?), based on data and rational derivation
# _! X4 f. s& |: g6 o" ]8 I. This article, however, can be interpreted as saying that all athletes are
3 c' W: h& K8 N0 l) F& ?doping and the authorities are just not good enough to catch them. That may
+ a3 y! U7 j" U! {be true, logically, but definitely will not make the case if there is ever a0 C( I' X7 s4 Y: c0 N5 k
hearing by the governing body for water sports, FINA, to determine if Ye
8 i/ ^/ M! p" j S bhas doped. To ask whether it is possible to obtain a false negative in a0 G/ K% Y0 O+ K! M7 f9 Y# @' J
drug test looks like a rigged question to me. Of course it is possible:
5 y: k$ G1 z" s( hother than the athlete taking a drug that the test is not designed to detect* U0 T% d( z; ?2 Q. X
, anyone who has taken quantum 101 will tell you that everything is
: p' O p4 n) O3 _% Y9 tprobabilistic in nature, and so there is a probability that the drug in an8 C/ E0 {6 q! N9 `6 o
athlete’s system could tunnel out right at the moment of the test. A slight
0 s2 }/ m6 |9 d x! schance it may be, but should we disregard all test results because of it?, W, N3 N A$ q- t' }' u$ |
Let’s be practical and reasonable, and accept that the World Anti-Doping
; m5 O$ ^* u; Pagency (WADA) is competent at its job. Ye’s urine sample will be stored for/ A( Y7 J5 {6 f8 J
eight years after the contest for future testing as technology advances.
* Q7 u2 Y$ p, _ X K) ^ w; EInnocent until proven guilty, shouldn’t it be?$ H- [1 A7 s7 G$ i. i: ?3 T) c6 L
- s9 i1 \/ ], ^2 f7 k. JSixth, and the last point I would like to make, is that the out-of-
" _5 m8 Z0 [0 W; ycompetition drug test is already in effect, which Callaway failed to mention
, S' {+ s( y( f8 Y8 N. As noted in the president of WADA’s press release, drug testing for3 e& M" L- e1 d/ t0 P3 q
Olympians began at least six months before the opening of the London6 g, w) n9 y! f, B/ P3 \! m& L8 M
Olympics. Furthermore, 107 athletes have been banned from this Olympics for+ z% K" ?/ d* `& ~
doping. That may be the reason that “everyone will pass at the Olympic
! G8 S' k7 M# h" l7 fgames. Hardly anyone fails in competition testing” — those who did dope6 b6 p& ^' Z) B7 ^
have already been caught and sanctioned. Callaway is free to suggest that a
9 ?; T& A; l' s2 O6 |4 Iplayer could have doped beforehand and fooled the test at the game, but this u$ j2 S; Z& C& [ q
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (. m; Q0 W! k* j3 }
intentionally or not) cherry-pick data that, in my view, are far too
{. ^) g b& N0 |! r: wsuggestive to be fair and unbiased. If you want to cover a story of a5 C$ ? J' P& g5 J, F* f; c: W
suspected doping from a scientific point of view, be impartial and provide
6 }+ r' ^, J0 |, c9 y4 }, t: lall the facts for the reader to judge. You are entitled to your# U2 u0 n: S, @5 ~* [6 G3 A
interpretation of the facts, and the expression thereof in your piece,+ k& ?5 O1 _ k3 c" m7 o2 r
explicitly or otherwise, but showing only evidence that favours your$ P a: ^/ H2 X. d$ v- O- j
argument is hardly good science or journalism. Such an article in a journal. y5 q1 w* d/ I$ g6 v# w$ U6 `
such as Nature is not an appropriate example of how scientific research or. i7 Z0 C8 r4 h7 g
reporting should be done. |
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