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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
3 v3 v* ]4 C- D如果是中国长大的,英语能到这种程度真是很不简单。) E, ]' L! U8 n# c N$ U. |
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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4 i1 {+ g# \, W0 T: jFROM 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
: T& _) k5 M- J, regard as one of the most prestigious and influential physical-science
( i" U% h$ N3 a! L* P# r2 f Jmagazines — publish a thinly veiled biased article like this. Granted, this
$ U7 n* W1 C' G1 \4 d$ w0 E# tis not a peer-reviewed scientific article and did not go through the( U( y2 p0 F/ [& i1 ]
scrutiny of picking referees. But to serve as a channel for the general
3 h4 H5 l0 G; q" l) V% P0 {& T3 Hpopulace to be in touch with and appreciate science, the authors and editors
% k% F! L9 ? p' N$ `( Q& H) mshould at least present the readers with facts within the proper context,$ s/ A) }- e. T/ [. E4 s
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
* r0 Q B" N ^( AOlympic 400-metre IM time with her performance at the World Championships in4 P& e. S* V5 Y2 u# S8 w# L
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
2 E I: c9 q. g% @: nanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous+ ?: w$ F+ r1 H/ s8 ]# @6 S' y
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
/ d! k0 g6 a) W& ?: a" D0 timprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
% [. v( f# V* G, @difference between the gold and silver medal, I see no reason for 5.38 s to7 i6 j* m& `# c. w1 v$ i
be treated as 7 s.
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2 S. A/ r. J/ ?- `- C" _Second, as previously pointed out, Ye is only 16 years old and her body is! }+ e; n; ^3 x2 K( o3 A
still developing. Bettering oneself by 5 seconds over two years may seem0 _8 z/ D. d/ i
impossible for an adult swimmer, but it certainly happens among youngsters.
, M1 v; a$ p7 g7 [8 {* k- sAn interview with Australian gold medallist Ian Thorpe revealed that his 400! s# m7 j4 r. b) N5 C, X
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
( @( n! Z9 v" R, f0 r. L! F+ A( hFor regular people, including Callaway, it may be hard to imagine what an
7 |3 X' M! X: y7 F; Belite swimmer can achieve as he or she matures and undergoes scientific and, F. e5 e* ^5 E. W6 e
persistent training. But jumping to the conclusion that it is “anomalous”5 C5 X3 ^0 n: F! t
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook7 x0 C3 ?7 A2 r! a5 i9 U7 Z7 F
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in1 ~( I2 u+ D3 t* Z
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so5 [, N, o( Y1 U2 Y/ K0 `
he chose not to push himself too hard and to conserve his energy for later/ v0 _" }7 \# K( S" ^$ }+ {
events (whether this conforms to the Olympic spirit and the ‘use one’s# x( C. I' Q( @& y/ g( r
best efforts to win a match’ requirement that the Badminton World1 x" g! B) F W! h. D7 t5 J
Federation recently invoked to disqualify four badminton pairs is another" o3 L9 }* _* M, X; @7 w
topic worth discussing, though probably not in Nature). Ye, on the other6 n. f) a+ E/ N+ D; }) r) Q) N/ ? `
hand, was trailing behind after the first 300 metres and relied on freestyle5 O* Y! t; z( ]/ k/ w% e
, in which she has an edge, to win the race. Failing to mention this
9 {) f+ v9 I+ f$ g; T& ]strategic difference, as well as the fact that Lochte is 23.25 seconds
5 p7 _! A- \1 k2 c2 |faster (4:05.18) than Ye overall, creates the illusion that a woman swam
5 R- b( W3 v' j- [* o5 }1 d" zfaster than the best man in the same sport, which sounds impossible. Putting
8 h4 G* ?' s6 v0 g) w6 caside the gender argument, I believe this is still a leading question that
- ^3 ?) i0 ~2 D; t7 G! yimplies to the reader that there is something fishy going on.
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) a3 K2 l: X* ~ `$ @Fourth is another example of cherry-picking. In the same event, there are
/ o1 \3 r, l" b) w0 [four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
, A4 j# H* v$ ~7 ks) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
3 v" ^) W7 X% j& k) g), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
. H6 J1 E; w _, `2 x! Sout, if we are just talking about the last 50 metres in a 400-metre IM,9 C- p& ]& H' Y1 U" n# I5 P3 C3 @
Lochter is not the example I would have used if I were the author. What kind
& h) j. Q. H w3 O1 f: j! ^) `' _2 Xof scientific rigorousness is Callaway trying to demonstrate here? Is it* q! [& z" C; C0 m! ]/ d7 f; t
logical that if Lochter is the champion, we should assume that he leads in
" P5 Y% I4 r2 s- z5 X2 severy split? That would be a terrible way to teach the public how science
. n) h0 O+ y/ _3 eworks.
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) b# f4 z/ ]& I/ j! o! HFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
7 H! y. i b6 Timplies that a drug test cannot rule out the possibility of doping. Is this7 R5 l- T! @7 G2 e- v$ A
kind of agnosticism what Nature really wants to teach its readers? By that
( v0 T8 B1 ?7 S* k- H3 Z0 v8 m# Qstandard, I estimate that at least half of the peer-reviewed scientific
$ A( N, ^+ ^3 R9 apapers in Nature should be retracted. How can one convince the editors and W% g) s! _7 e7 ~
reviewers that their proposed theory works for every possible case? One+ q# _0 |5 W' n
cannot. One chooses to apply the theory to typical examples and to
% `" v# j `3 k$ G9 edemonstrate that in (hopefully) all scenarios considered, the theory works- M5 o8 p, j8 } u% p$ O
to a degree, and that that should warrant publication until a counterexample2 p( i, Y7 n% @8 d' z2 ]1 k% x. k( O
is found. I could imagine that Callaway has a sceptical mind, which is+ v9 c+ O/ @. v! H2 R
crucial to scientific thinking, but that would be put to better use if he) c2 J' a' u3 ^$ {! g C" C) ]
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly; U- R V& s% E8 q
advanced, non-detectable drug that the Chinese have come up with in the- L* ?) D$ q1 Q7 k$ ^8 Y, j
past 4 years (they obviously did not have it in Beijing, otherwise why not
3 S- m$ K0 B& Euse it and woo the audience at home?), based on data and rational derivation/ y, ^3 |# f# U7 ]1 {: a, c) G2 \& B
. This article, however, can be interpreted as saying that all athletes are
/ P" R+ G& H7 @2 L- Gdoping and the authorities are just not good enough to catch them. That may
8 Z+ M7 S7 o( n7 Z3 G, l% D7 [be true, logically, but definitely will not make the case if there is ever a
9 S: S* T0 ~% [6 k" o! rhearing by the governing body for water sports, FINA, to determine if Ye
. g$ l/ ?: Y( h& {6 hhas doped. To ask whether it is possible to obtain a false negative in a
7 F' t2 d2 g" Qdrug test looks like a rigged question to me. Of course it is possible:( g) L8 v5 q6 ]2 p' q
other than the athlete taking a drug that the test is not designed to detect5 [; m+ o* X! X. a
, anyone who has taken quantum 101 will tell you that everything is
- ` f: s4 M; P4 yprobabilistic in nature, and so there is a probability that the drug in an& q4 g1 y: Q9 a/ C$ i9 S6 @
athlete’s system could tunnel out right at the moment of the test. A slight! X8 ^% |1 q$ D
chance it may be, but should we disregard all test results because of it?+ B, b1 O; l- I3 d
Let’s be practical and reasonable, and accept that the World Anti-Doping
; j3 k/ H9 D6 V r# fagency (WADA) is competent at its job. Ye’s urine sample will be stored for2 ]7 O E& L1 \* t2 i
eight years after the contest for future testing as technology advances.. Y5 g: P6 z/ X6 e# g9 m
Innocent until proven guilty, shouldn’t it be?9 U: w* v' Q$ Y6 f! h8 W
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Sixth, and the last point I would like to make, is that the out-of-: c0 x1 [& J/ Q2 ] [- u. k4 Y) E$ Y7 v
competition drug test is already in effect, which Callaway failed to mention% U5 ]; B* T; {* ~
. As noted in the president of WADA’s press release, drug testing for' e9 K$ b4 D5 P) t& B$ V) S+ M
Olympians began at least six months before the opening of the London
1 y% w- _7 I9 \# |& sOlympics. Furthermore, 107 athletes have been banned from this Olympics for
# u3 R8 n3 l3 c/ G7 I! Cdoping. That may be the reason that “everyone will pass at the Olympic. T" {" S: W, c; f' |+ |
games. Hardly anyone fails in competition testing” — those who did dope0 x' m+ _: T6 q. e: {: x
have already been caught and sanctioned. Callaway is free to suggest that a
" A$ L( J* \" Yplayer could have doped beforehand and fooled the test at the game, but this
3 d/ \2 Z! G4 C* t, Ppossibility is certainly ruled out for Ye.
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: v/ g m* N& v$ ]3 N3 ZOver all, even though Callaway did not falsify any data, he did (
- T* Z0 k5 A' Rintentionally or not) cherry-pick data that, in my view, are far too' N& Q# B: N8 l. M
suggestive to be fair and unbiased. If you want to cover a story of a- ^* k& U/ t: h1 c$ ?# _
suspected doping from a scientific point of view, be impartial and provide
4 v2 f$ I8 l; y8 N3 @all the facts for the reader to judge. You are entitled to your6 ~& v; f3 r3 R1 O
interpretation of the facts, and the expression thereof in your piece,( I K+ w' L# {& }* i, _
explicitly or otherwise, but showing only evidence that favours your
( e- N+ w# e; K" Wargument is hardly good science or journalism. Such an article in a journal
: n* @7 l2 v: I( m0 u: c7 |such as Nature is not an appropriate example of how scientific research or% F5 r- l. K3 v) X- b l
reporting should be done. |
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