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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
& M: @* T0 J' q5 @0 d4 k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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' [9 ^6 C" P; k7 E; n+ o# dhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html- B+ r7 `9 p2 f5 l% a
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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
6 T( r3 `5 w- w1 U2 ], regard as one of the most prestigious and influential physical-science
" Q+ k2 M. j. V2 z% Q$ X7 \magazines — publish a thinly veiled biased article like this. Granted, this
* b, f# `( B: ~0 P7 |is not a peer-reviewed scientific article and did not go through the
* ^' W+ k6 ]: m# M1 t1 A5 Jscrutiny of picking referees. But to serve as a channel for the general3 t k) W" m9 @7 L0 }8 n% z/ T
populace to be in touch with and appreciate science, the authors and editors0 ?$ r) L& }/ z f
should at least present the readers with facts within the proper context,
J8 W( v* _/ N% }which they blatantly failed to do.7 l) i4 T9 k2 {* \5 U
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First, to identify Ye’s performance increase, Ewen Callaway compared her5 n: h1 }6 l# c: O# @) i
Olympic 400-metre IM time with her performance at the World Championships in
+ c# F2 W! M# q- I- v: J! M2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “8 M/ Y t5 j7 m0 h! j V
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous2 l$ t: X# g' J2 Q& Q# f( V8 ~
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
$ A; ?+ r- D4 Jimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the3 o0 a5 d8 Z/ p
difference between the gold and silver medal, I see no reason for 5.38 s to9 ]6 ~0 c4 e$ z0 K7 e
be treated as 7 s., d" q4 u9 T( D# Z; {
3 b6 m: m9 O$ M, T% h" KSecond, as previously pointed out, Ye is only 16 years old and her body is
0 O n% S+ ]0 k. o+ V1 s& Cstill developing. Bettering oneself by 5 seconds over two years may seem
- G8 E0 W2 W1 e C0 @* [2 g% Limpossible for an adult swimmer, but it certainly happens among youngsters.. ?7 e# |7 r; k2 f! I
An interview with Australian gold medallist Ian Thorpe revealed that his 400! \8 L/ S0 q% c/ W9 j
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.- Z% H% V1 c, m+ l+ z) V( P/ r% b
For regular people, including Callaway, it may be hard to imagine what an5 X4 p. u3 L9 G& [* V
elite swimmer can achieve as he or she matures and undergoes scientific and
( E! I0 ~0 A. }3 l- Z# U; apersistent training. But jumping to the conclusion that it is “anomalous”
% Z2 w& c$ l1 |3 Y9 ]based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.! N+ O5 Q* G# R( n
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
o6 t( t! i: u0 D$ ]example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in% Z* m# F/ s8 _) M
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
& |, c" E4 b7 @# ~( |, s! r3 E5 She chose not to push himself too hard and to conserve his energy for later
" _6 t& @9 e0 I1 y8 Q+ Y; Oevents (whether this conforms to the Olympic spirit and the ‘use one’s* X' d6 s! [2 I& S* ]* ?; H
best efforts to win a match’ requirement that the Badminton World
1 F3 y$ E4 u" c- P! D6 X5 HFederation recently invoked to disqualify four badminton pairs is another
) G+ s5 v8 z7 l0 X2 {topic worth discussing, though probably not in Nature). Ye, on the other7 n. l5 d/ t' f, i
hand, was trailing behind after the first 300 metres and relied on freestyle4 z' {# ~# w* g: Q
, in which she has an edge, to win the race. Failing to mention this9 }7 H- j- a& [3 e6 c
strategic difference, as well as the fact that Lochte is 23.25 seconds: w# W6 S% r _0 ~
faster (4:05.18) than Ye overall, creates the illusion that a woman swam$ y2 e% Q' }+ Y E9 O7 P5 Z
faster than the best man in the same sport, which sounds impossible. Putting' n, ?/ v8 p; Q
aside the gender argument, I believe this is still a leading question that+ r( f0 Z* h1 D7 _% e
implies to the reader that there is something fishy going on.
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" C' g& T5 \- a/ j. JFourth is another example of cherry-picking. In the same event, there are& O# `+ ~6 Z% Z1 X9 W
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93- }; g8 m3 a! L4 O2 ?
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s: s K N4 ~& ~2 k2 E
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
$ F, {1 ~! B8 b( Wout, if we are just talking about the last 50 metres in a 400-metre IM,8 [/ b/ u" [2 U
Lochter is not the example I would have used if I were the author. What kind
; f3 z+ c+ q7 @8 d( Eof scientific rigorousness is Callaway trying to demonstrate here? Is it
1 Z' Q; r+ O3 ^( _( V$ Clogical that if Lochter is the champion, we should assume that he leads in0 n+ |' f: P( h; N
every split? That would be a terrible way to teach the public how science
! C3 o E& \( h; iworks.7 c P2 G! l3 A+ m7 V
! P5 k. d* n6 s9 d8 S2 j* BFifth is the issue I oppose the most. Callaway quotes Ross Tucker and1 f* a/ U, I( ~, [8 B
implies that a drug test cannot rule out the possibility of doping. Is this
; G g; q' M F0 |kind of agnosticism what Nature really wants to teach its readers? By that. y- c) d$ t6 j& v, l5 I
standard, I estimate that at least half of the peer-reviewed scientific' s# T$ `, Y9 {6 J7 R
papers in Nature should be retracted. How can one convince the editors and7 J j5 x4 p0 u+ } ]- q
reviewers that their proposed theory works for every possible case? One
* a4 ~2 Y) N0 zcannot. One chooses to apply the theory to typical examples and to, M4 [2 p- r, O. n4 R4 e8 x% y! `
demonstrate that in (hopefully) all scenarios considered, the theory works% G; T j! ^ T9 Z! @8 h
to a degree, and that that should warrant publication until a counterexample/ m9 F9 O. ]; L: P0 A( Z4 F( P
is found. I could imagine that Callaway has a sceptical mind, which is+ u5 j5 f4 ?& f, K; y; a( z1 Z: M
crucial to scientific thinking, but that would be put to better use if he5 w' h h- Z6 [2 V H7 R
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly7 u8 s0 ]- ?- W1 w4 I
advanced, non-detectable drug that the Chinese have come up with in the
* \2 Z: V; k c6 y; H2 `past 4 years (they obviously did not have it in Beijing, otherwise why not- v" X/ a2 H4 d W' M
use it and woo the audience at home?), based on data and rational derivation
( @) v( @) v. H b5 p. This article, however, can be interpreted as saying that all athletes are
) k6 m0 ^ J8 } K) @: ^doping and the authorities are just not good enough to catch them. That may# o# `4 R2 f+ o' b' @7 y
be true, logically, but definitely will not make the case if there is ever a6 \' G8 E! Q5 U3 V6 i# l
hearing by the governing body for water sports, FINA, to determine if Ye5 f- q& S% O& z1 o( {( j+ O8 F- E
has doped. To ask whether it is possible to obtain a false negative in a
. R, v, ^9 _1 v5 K1 N! ndrug test looks like a rigged question to me. Of course it is possible:6 H, b- L% c4 \3 u5 @, o
other than the athlete taking a drug that the test is not designed to detect
' w# x, I& G6 o. G3 `, anyone who has taken quantum 101 will tell you that everything is/ i" j1 b6 c8 r: }
probabilistic in nature, and so there is a probability that the drug in an
$ f& ]$ n5 ?( A' R$ P8 j6 Iathlete’s system could tunnel out right at the moment of the test. A slight
& M! }3 O; H4 S8 o3 n4 S# o. Fchance it may be, but should we disregard all test results because of it?
/ w3 C, v5 n9 [8 e1 n: |. @Let’s be practical and reasonable, and accept that the World Anti-Doping
! N: [0 a# P& d5 }, gagency (WADA) is competent at its job. Ye’s urine sample will be stored for
. r* T$ Q6 X+ \5 u3 Beight years after the contest for future testing as technology advances.) D7 c# L& e" X9 L- u% W. c% L
Innocent until proven guilty, shouldn’t it be?
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Z7 b z& g! F( e3 }( v8 v& _7 rSixth, and the last point I would like to make, is that the out-of-9 |- \, c; e0 @ T
competition drug test is already in effect, which Callaway failed to mention" Y* w9 A( H, \; U
. As noted in the president of WADA’s press release, drug testing for v% Z$ q3 Q' x3 x% U
Olympians began at least six months before the opening of the London
# M+ n3 S$ D5 z& G6 I$ vOlympics. Furthermore, 107 athletes have been banned from this Olympics for
) Q2 J0 ~. N. F$ a: ?doping. That may be the reason that “everyone will pass at the Olympic
4 E6 C" x% j: p3 tgames. Hardly anyone fails in competition testing” — those who did dope
# s- ?& Q# y7 B4 h& R4 ohave already been caught and sanctioned. Callaway is free to suggest that a
/ Y3 E, ]: Q. _7 N- Dplayer could have doped beforehand and fooled the test at the game, but this
( b1 d6 q1 t: S4 h7 |8 qpossibility is certainly ruled out for Ye.
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1 t" @9 d3 L$ Z8 ROver all, even though Callaway did not falsify any data, he did (
3 k3 x) x# ?6 f4 Q$ {0 uintentionally or not) cherry-pick data that, in my view, are far too
2 y: j/ B$ v; E' asuggestive to be fair and unbiased. If you want to cover a story of a( u+ V) ?: ?( E1 d# _+ I$ k4 [* E
suspected doping from a scientific point of view, be impartial and provide
0 v( p3 W# H! L: f$ ~. t" C+ M8 Xall the facts for the reader to judge. You are entitled to your* v* {% l* Q" ^) `/ X# M
interpretation of the facts, and the expression thereof in your piece,5 _1 ^5 f0 B3 R0 ~; d& }/ n& {8 C
explicitly or otherwise, but showing only evidence that favours your# D0 v% Q b" n+ i; I
argument is hardly good science or journalism. Such an article in a journal
, V0 ]- B* u" G6 }such as Nature is not an appropriate example of how scientific research or
3 P! y! j% a9 e$ u) s- Ireporting should be done. |
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