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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
* G' @9 o) Y( |6 }$ l如果是中国长大的,英语能到这种程度真是很不简单。, P% R1 ]: b5 g0 K
$ H7 o6 q- L2 T7 O* vhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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' z8 s& U5 m6 l( W9 Q& L* i8 U7 QFROM 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
% l$ H7 c9 [. h& c% A2 h W1 J, regard as one of the most prestigious and influential physical-science
4 J/ s# y4 Z I7 Kmagazines — publish a thinly veiled biased article like this. Granted, this& ]+ k- T5 V( m6 K
is not a peer-reviewed scientific article and did not go through the5 ]) [9 m( ]5 a5 Z) N: Z
scrutiny of picking referees. But to serve as a channel for the general* \/ V" X, H T( l. d
populace to be in touch with and appreciate science, the authors and editors9 J% [1 b6 t6 l# b
should at least present the readers with facts within the proper context,6 e! N4 R/ \: T7 u
which they blatantly failed to do.
7 r0 y. ]5 \2 v' F( Y+ ^
7 i& P( @) H& k+ {4 W4 SFirst, to identify Ye’s performance increase, Ewen Callaway compared her) X p% c5 Z- g( T g
Olympic 400-metre IM time with her performance at the World Championships in* R5 I3 u/ o! X& q5 W9 t, o
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “6 {! o% R, Z$ S
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
8 W% `. J9 _8 F" \1 Dpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an, T G3 l2 \& Q' m
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the, e& r; ?9 O( y, W
difference between the gold and silver medal, I see no reason for 5.38 s to" X) e7 h% G$ J8 X
be treated as 7 s.$ X( Q [1 ?% j4 d/ U- {
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Second, as previously pointed out, Ye is only 16 years old and her body is
- v. f6 K$ H/ ?still developing. Bettering oneself by 5 seconds over two years may seem
/ Q5 _9 s; P* g5 T# ?impossible for an adult swimmer, but it certainly happens among youngsters.3 [/ o6 O9 _: C/ d3 y- D4 ?
An interview with Australian gold medallist Ian Thorpe revealed that his 400
: [7 H- m( A- Z1 B1 W/ y, W-metre freestyle time improved by 5 seconds between the ages of 15 and 16./ ~' L1 l+ H& r6 ]2 G
For regular people, including Callaway, it may be hard to imagine what an
3 R8 t3 @7 J9 P( y0 Qelite swimmer can achieve as he or she matures and undergoes scientific and
# k+ {/ N* C0 E' \, npersistent training. But jumping to the conclusion that it is “anomalous”
. ~1 _8 e# X0 T% ?& J9 d3 \6 Y1 cbased 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 textbook6 A$ N: @, r6 F, u; t+ o1 f% o
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in Z: |: E% ~( o1 {
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so# Z; c7 \/ D/ [5 O V
he chose not to push himself too hard and to conserve his energy for later
' y' D' I8 e1 _' P) l* y' ~events (whether this conforms to the Olympic spirit and the ‘use one’s
5 c# _9 t% N/ ~4 M6 h9 d) Jbest efforts to win a match’ requirement that the Badminton World
+ F5 C* w n( y$ o$ vFederation recently invoked to disqualify four badminton pairs is another( v% Z. L. r. E, n. X
topic worth discussing, though probably not in Nature). Ye, on the other6 d3 C' U0 d: s, G U( p8 X
hand, was trailing behind after the first 300 metres and relied on freestyle
" H& W! A# H$ U" K9 }' o5 D, in which she has an edge, to win the race. Failing to mention this" R% e' H! G, f9 I$ ?
strategic difference, as well as the fact that Lochte is 23.25 seconds
8 S, S1 K, t z* I( v+ w: ffaster (4:05.18) than Ye overall, creates the illusion that a woman swam2 m2 a9 H: z- f* w3 k
faster than the best man in the same sport, which sounds impossible. Putting
3 f1 e! [9 a3 K; g& q/ _- X+ @aside the gender argument, I believe this is still a leading question that( I; u( V# r6 B, [ T
implies to the reader that there is something fishy going on.* X/ }( f ]) e: v
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Fourth is another example of cherry-picking. In the same event, there are
2 w9 h$ {# F1 y& N W8 ~four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
6 I- P y( O* g4 W# K' z3 ds) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
! q' O/ c3 O$ a i3 T), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
0 t" M' s* a2 o0 b: s! ?. W" Uout, if we are just talking about the last 50 metres in a 400-metre IM,
4 J4 S- g0 Z. X" T7 f0 ILochter is not the example I would have used if I were the author. What kind
* p2 e9 K: h$ y) r% qof scientific rigorousness is Callaway trying to demonstrate here? Is it
' x5 r8 N I5 v- b2 `logical that if Lochter is the champion, we should assume that he leads in
. o3 c+ e/ F+ Z X+ a+ nevery split? That would be a terrible way to teach the public how science
5 T$ X4 Q7 X/ e/ Q$ a/ |works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
7 q9 Z2 }" b) @( b* Cimplies that a drug test cannot rule out the possibility of doping. Is this
: r. N) }: H1 ]* O) R5 ?: _kind of agnosticism what Nature really wants to teach its readers? By that
0 A5 N" U% r8 R2 G* G7 jstandard, I estimate that at least half of the peer-reviewed scientific% S; S. [/ H) p. Q3 v7 E+ x3 X- W2 y
papers in Nature should be retracted. How can one convince the editors and
! C* W1 E$ Y6 x4 M5 breviewers that their proposed theory works for every possible case? One0 I4 ^/ v9 y+ U6 \9 Z
cannot. One chooses to apply the theory to typical examples and to3 q/ k1 B* V8 Q& a$ H
demonstrate that in (hopefully) all scenarios considered, the theory works
0 f/ A l7 L4 \# h. h |to a degree, and that that should warrant publication until a counterexample' Q- _) l# i0 p: t0 P8 W
is found. I could imagine that Callaway has a sceptical mind, which is3 U g( U Z5 N7 R/ s
crucial to scientific thinking, but that would be put to better use if he: I; O0 Q) d1 M2 O M$ l% C
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly( V; @. [- Q8 O9 F: E$ f) D. e `! U
advanced, non-detectable drug that the Chinese have come up with in the" j7 s/ ?: X2 C0 b; _! L
past 4 years (they obviously did not have it in Beijing, otherwise why not1 B+ e+ S, S1 ~ S! d. |" t
use it and woo the audience at home?), based on data and rational derivation
1 n% E9 b; E; z# B3 x. z7 w. ]. This article, however, can be interpreted as saying that all athletes are& i6 ?. V' U# d5 l6 t- Y/ Y3 E6 \8 @
doping and the authorities are just not good enough to catch them. That may. R4 j, n, B, {- y
be true, logically, but definitely will not make the case if there is ever a
4 q8 E1 @3 f7 khearing by the governing body for water sports, FINA, to determine if Ye1 ?% l; X* i2 P+ f
has doped. To ask whether it is possible to obtain a false negative in a8 D, p* \, {. N
drug test looks like a rigged question to me. Of course it is possible:+ \: Q( T- }# q7 I
other than the athlete taking a drug that the test is not designed to detect
% C$ |8 J {0 G1 P4 b2 y, anyone who has taken quantum 101 will tell you that everything is
$ ?' v- |/ u3 v+ t: }; Nprobabilistic in nature, and so there is a probability that the drug in an+ X% P4 ]. F9 Z7 W
athlete’s system could tunnel out right at the moment of the test. A slight" _# n a9 b- u, z. U5 Q: n4 D: s5 p
chance it may be, but should we disregard all test results because of it?/ B% ]) {5 L' O
Let’s be practical and reasonable, and accept that the World Anti-Doping/ M2 O# o. n% d* c& s7 K
agency (WADA) is competent at its job. Ye’s urine sample will be stored for6 V' w* C a U% `( I3 }* Z
eight years after the contest for future testing as technology advances.
) }! ?+ d3 R3 u* m4 f1 CInnocent until proven guilty, shouldn’t it be?
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Sixth, and the last point I would like to make, is that the out-of-* H' ]0 i0 q7 E
competition drug test is already in effect, which Callaway failed to mention
; F5 H# }. f; k6 f- L. As noted in the president of WADA’s press release, drug testing for4 y3 a \: L) V' G) n6 C3 ^3 Z
Olympians began at least six months before the opening of the London
9 b% F, {; N+ O$ Y' k4 gOlympics. Furthermore, 107 athletes have been banned from this Olympics for
" S% a. n3 A! u, H5 \6 Hdoping. That may be the reason that “everyone will pass at the Olympic
) V6 x# [; Q9 Sgames. Hardly anyone fails in competition testing” — those who did dope/ F% ?9 p5 o @' M0 \: z$ o& `0 _
have already been caught and sanctioned. Callaway is free to suggest that a
Y) V4 i$ w+ x; N) s' N/ \7 U$ Gplayer could have doped beforehand and fooled the test at the game, but this1 s& f6 u# i# B
possibility is certainly ruled out for Ye.2 f8 h8 \6 |2 t |! {# K
8 \5 p9 D/ n. G1 x2 tOver all, even though Callaway did not falsify any data, he did (
; Z0 V4 N" n- [intentionally or not) cherry-pick data that, in my view, are far too7 t. V( B5 o9 N1 D' c, `
suggestive to be fair and unbiased. If you want to cover a story of a8 I$ u- Z$ }# d9 ?
suspected doping from a scientific point of view, be impartial and provide5 P( }; q/ N$ q0 V
all the facts for the reader to judge. You are entitled to your
; f8 ^1 H. R x5 R S, ointerpretation of the facts, and the expression thereof in your piece,+ o0 q6 e( B* Q+ [2 G ~ o
explicitly or otherwise, but showing only evidence that favours your# |; E, X3 b3 {5 d# @- r
argument is hardly good science or journalism. Such an article in a journal5 H4 I, ]/ q, W" t7 y
such as Nature is not an appropriate example of how scientific research or+ \* q0 a" y# L% s6 m% u, V
reporting should be done. |
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