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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
- e" g; J2 N2 B+ Q: X& z5 K/ u4 H1 I如果是中国长大的,英语能到这种程度真是很不简单。6 `* f" G1 `4 f7 L) ^9 |
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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K, H8 R0 ?4 e6 Z0 b0 ~It is a shame to see Nature — which nearly all scientists, including myself' l% G* u4 p+ s+ S/ _4 E1 Q
, regard as one of the most prestigious and influential physical-science2 p* Z* u6 M% d0 g; |' k
magazines — publish a thinly veiled biased article like this. Granted, this
4 |0 N# b" W# S! H8 b& Eis not a peer-reviewed scientific article and did not go through the& A b" i$ u) \$ J6 S
scrutiny of picking referees. But to serve as a channel for the general) |: X7 \3 P0 C! ^" ]5 c0 ?/ u% o
populace to be in touch with and appreciate science, the authors and editors$ }; K7 `" w6 A
should at least present the readers with facts within the proper context,' p6 @. a, A+ I9 A. w8 v6 \
which they blatantly failed to do.( }0 s& |0 h7 ?: k r# Q- ~
' Q3 K' |0 g. i+ S5 KFirst, to identify Ye’s performance increase, Ewen Callaway compared her, v, {/ v1 t& f W
Olympic 400-metre IM time with her performance at the World Championships in
- d4 \+ b# b7 n/ n4 g4 J: t2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
2 v: s" l1 q9 B+ C; P- m n7 n% j- vanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
/ ?5 X) M! p9 G: epersonal best was 4:33.79 at the Asian Games in 2010. This leads to an: F* q- v1 U( @3 j
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
: J0 v- J0 b/ b/ T) }; U6 e3 ]; rdifference between the gold and silver medal, I see no reason for 5.38 s to
$ R8 ]1 M! S, ~" x- _; B$ lbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is1 t6 t$ h O) Q8 s
still developing. Bettering oneself by 5 seconds over two years may seem6 N. S1 E) x7 K9 P& i# g
impossible for an adult swimmer, but it certainly happens among youngsters.
, M$ h o6 H5 C+ l$ BAn interview with Australian gold medallist Ian Thorpe revealed that his 400% j$ m" e( Q5 M( `" S
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
$ o2 s- Q: g% D4 H4 n. hFor regular people, including Callaway, it may be hard to imagine what an# I( ~8 L& z0 i9 O9 O+ a) b- _
elite swimmer can achieve as he or she matures and undergoes scientific and
: z3 S4 n, f) s* {persistent training. But jumping to the conclusion that it is “anomalous”3 d# Z! i' j, e+ F5 _/ j! }
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.* }+ I* @* D6 n: Q7 y, u9 A
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook- t8 ^( n$ m7 |1 T
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in: M, a$ _& g6 W, L" _" H
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so2 N% {& H# T( K4 \/ y& P( W
he chose not to push himself too hard and to conserve his energy for later3 @: @4 n, Y0 Z9 c, g- K- K+ y9 }
events (whether this conforms to the Olympic spirit and the ‘use one’s3 X) s, e2 ]9 A0 ~3 G! M: H' ~
best efforts to win a match’ requirement that the Badminton World
( `/ w, j4 ?. d* O! v! Q ^Federation recently invoked to disqualify four badminton pairs is another' \6 B( M3 ?2 O
topic worth discussing, though probably not in Nature). Ye, on the other7 @# Z# s% w# C2 H: l
hand, was trailing behind after the first 300 metres and relied on freestyle
8 Q4 @: g% h9 v9 S, in which she has an edge, to win the race. Failing to mention this
. d7 K- o( x2 J vstrategic difference, as well as the fact that Lochte is 23.25 seconds
% u9 w; P. M" yfaster (4:05.18) than Ye overall, creates the illusion that a woman swam: C3 K! u4 [& {8 S. l
faster than the best man in the same sport, which sounds impossible. Putting' o5 L. j1 C/ q& O8 r
aside the gender argument, I believe this is still a leading question that5 o& x, v1 b( ~6 u
implies to the reader that there is something fishy going on.
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4 `2 B' ^ n% V8 c( O% A" [Fourth is another example of cherry-picking. In the same event, there are3 V/ a1 ]! ^5 |! R3 A
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
2 {; @. W$ J/ W$ Q" J! y7 us) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
6 C- w/ Y5 o9 L6 ^ O), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns: T" ?0 v% r+ l
out, if we are just talking about the last 50 metres in a 400-metre IM,. o; I. Q$ X6 S( P2 g
Lochter is not the example I would have used if I were the author. What kind
) {/ v8 ]! k7 P9 |6 u8 |of scientific rigorousness is Callaway trying to demonstrate here? Is it
) H3 g8 g( t9 D8 Q. t; tlogical that if Lochter is the champion, we should assume that he leads in1 v; B r# h! F) @* o. t
every split? That would be a terrible way to teach the public how science( R( h3 p; o- W/ T" Q* k" A: E% ]
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
& k1 F2 N r7 }' O) @% R. N! Ximplies that a drug test cannot rule out the possibility of doping. Is this: M& f o! H4 f+ Q! ]
kind of agnosticism what Nature really wants to teach its readers? By that, b: E% r. P# ?( q
standard, I estimate that at least half of the peer-reviewed scientific
. [; _. x0 K+ y& t! |papers in Nature should be retracted. How can one convince the editors and, @8 ^6 f9 r9 A! n1 ]) }0 v$ ^6 U
reviewers that their proposed theory works for every possible case? One
! L! O% ~* \& Z! xcannot. One chooses to apply the theory to typical examples and to, S- |2 }8 m! f' I, B7 |
demonstrate that in (hopefully) all scenarios considered, the theory works/ j% |- ^" `. z( w
to a degree, and that that should warrant publication until a counterexample$ `3 G: k7 r4 a- k+ V, e1 `
is found. I could imagine that Callaway has a sceptical mind, which is
, e) y" k1 B- X! y- X. rcrucial to scientific thinking, but that would be put to better use if he
+ w5 ?0 S$ L+ D8 Hwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly/ h) q, N% }( w2 }. ?, l
advanced, non-detectable drug that the Chinese have come up with in the
$ K2 h ?) `! \: ]' E8 M3 hpast 4 years (they obviously did not have it in Beijing, otherwise why not
0 X8 S3 |4 ] D" w+ _1 r& O( `use it and woo the audience at home?), based on data and rational derivation \, W4 d1 U: H8 W. p1 a
. This article, however, can be interpreted as saying that all athletes are
2 K5 ?3 Y) m# i7 \! Edoping and the authorities are just not good enough to catch them. That may" d, Q/ I" `& W# q8 x# U8 |
be true, logically, but definitely will not make the case if there is ever a
+ J9 j2 u8 h3 xhearing by the governing body for water sports, FINA, to determine if Ye* I B i' ~. R( P, n9 d
has doped. To ask whether it is possible to obtain a false negative in a) `. k7 ^/ x1 Y
drug test looks like a rigged question to me. Of course it is possible:% a, s: D/ z6 P _2 z
other than the athlete taking a drug that the test is not designed to detect w7 D! n( E. R! f9 z
, anyone who has taken quantum 101 will tell you that everything is
/ q* i: z3 g/ n1 u+ `2 G" Jprobabilistic in nature, and so there is a probability that the drug in an: ?: z# z' P( M" b! C+ e2 ^
athlete’s system could tunnel out right at the moment of the test. A slight$ C, T+ R* J7 f7 x/ P3 O
chance it may be, but should we disregard all test results because of it?
& m5 G4 B" X' }Let’s be practical and reasonable, and accept that the World Anti-Doping
+ g2 W4 D3 o: Q( v' ^2 a/ Vagency (WADA) is competent at its job. Ye’s urine sample will be stored for/ L5 C7 @, T o9 G0 i+ q
eight years after the contest for future testing as technology advances.
) u6 y0 M: ?4 sInnocent until proven guilty, shouldn’t it be?
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3 A$ W+ A5 l% F2 h- t/ tSixth, and the last point I would like to make, is that the out-of-' }( O8 v' b4 {) r, k1 T! G3 e
competition drug test is already in effect, which Callaway failed to mention
1 @8 Z9 s& t2 R. As noted in the president of WADA’s press release, drug testing for
( g+ ^: b; c1 T) t: G3 WOlympians began at least six months before the opening of the London6 o B! s1 i: e# S( r
Olympics. Furthermore, 107 athletes have been banned from this Olympics for6 F, R- u3 l0 a+ I
doping. That may be the reason that “everyone will pass at the Olympic
; R( L" M) k% R: x- {! Ugames. Hardly anyone fails in competition testing” — those who did dope
4 @0 R, L' J' k5 q3 D" q' y* ~have already been caught and sanctioned. Callaway is free to suggest that a) v0 L2 c9 G# t$ r3 B3 }& t
player could have doped beforehand and fooled the test at the game, but this
7 M4 T+ p- R6 ]- A6 Z, cpossibility is certainly ruled out for Ye.: ?2 b2 W8 F4 p) F, V* o& F; ?- K2 c
/ U6 c+ l' C( b r$ Z& `Over all, even though Callaway did not falsify any data, he did (
0 u" u' ~. F1 |1 p0 ointentionally or not) cherry-pick data that, in my view, are far too/ b2 R# i& e* J! e
suggestive to be fair and unbiased. If you want to cover a story of a$ B- w) ^- t% `. ~
suspected doping from a scientific point of view, be impartial and provide2 @3 {3 ?$ M/ f$ ?8 q6 v
all the facts for the reader to judge. You are entitled to your0 q, P. R0 d' _& |+ i0 {1 f0 L; V
interpretation of the facts, and the expression thereof in your piece,! p3 r7 b/ [% h4 q8 j
explicitly or otherwise, but showing only evidence that favours your3 m# l* `; F9 G ~$ d* D; V a! k$ w
argument is hardly good science or journalism. Such an article in a journal
9 N$ A3 S0 X. t" C; Y. R2 gsuch as Nature is not an appropriate example of how scientific research or9 t0 o; a6 c! y& ?- W p; ]
reporting should be done. |
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