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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 Y- e |: b! G如果是中国长大的,英语能到这种程度真是很不简单。* F4 k: W% [! O: Z ]
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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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E9 s9 {* G( d8 GIt is a shame to see Nature — which nearly all scientists, including myself
% |* J& S$ J5 H% b# w9 L7 D1 N, regard as one of the most prestigious and influential physical-science
7 ^2 H1 ^/ m. nmagazines — publish a thinly veiled biased article like this. Granted, this
' V; n; Z# O2 B$ I9 a5 s+ dis not a peer-reviewed scientific article and did not go through the5 }9 d. \) t5 b0 ]$ c( P6 H
scrutiny of picking referees. But to serve as a channel for the general1 ~" X6 j- \' Y- j
populace to be in touch with and appreciate science, the authors and editors
, o/ x$ [- b6 W% g! _! Ushould at least present the readers with facts within the proper context,/ A& c0 B2 \0 A0 e% R: F _9 |/ r
which they blatantly failed to do.
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1 H8 r& U' o/ C0 x; b, gFirst, to identify Ye’s performance increase, Ewen Callaway compared her) l; {' y( U$ a# j
Olympic 400-metre IM time with her performance at the World Championships in" m! K- c/ f3 d- u
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “+ m" B+ Q- L; c& A
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous+ f# A' B k5 N) T
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
5 ]% \) A m/ f+ r4 `" C# Qimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the" w d8 \* L( j' R; r! ?' T, g2 d; o
difference between the gold and silver medal, I see no reason for 5.38 s to2 M/ q. f% \5 [ o7 _" ~
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is/ H# t9 f! Q4 w/ N1 t# f7 \+ }0 H
still developing. Bettering oneself by 5 seconds over two years may seem
) m f5 E6 \" g& {% V$ Rimpossible for an adult swimmer, but it certainly happens among youngsters.
' h, ^4 M+ f6 dAn interview with Australian gold medallist Ian Thorpe revealed that his 400
+ |. F7 E' t% ^" R: Z# n& W; g-metre freestyle time improved by 5 seconds between the ages of 15 and 16.8 k3 T2 s# p4 C" A; d2 v
For regular people, including Callaway, it may be hard to imagine what an
8 i" R+ ] ]5 m# P4 E2 z3 |elite swimmer can achieve as he or she matures and undergoes scientific and
+ }; g7 ?. @% m( t' Upersistent training. But jumping to the conclusion that it is “anomalous”
+ U, ?. h: ]7 J9 W* ~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 textbook
3 m' g. L$ x/ e. dexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in! X) `4 V2 s6 k1 U/ N
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so3 i1 E% L# U9 A+ M6 ]5 k7 X
he chose not to push himself too hard and to conserve his energy for later
; |& q% B1 Y* N$ Yevents (whether this conforms to the Olympic spirit and the ‘use one’s
8 ~$ f. C1 ]& y7 r3 w/ Xbest efforts to win a match’ requirement that the Badminton World* M3 ]4 v8 u0 n- J& m$ \
Federation recently invoked to disqualify four badminton pairs is another* G* p9 }) y! N6 x/ O
topic worth discussing, though probably not in Nature). Ye, on the other
2 l8 w5 W% I; b Ohand, was trailing behind after the first 300 metres and relied on freestyle a) [/ I- ^, w4 F, ?6 I
, in which she has an edge, to win the race. Failing to mention this% |; \# m/ r& \4 Q
strategic difference, as well as the fact that Lochte is 23.25 seconds
* }- B, L6 s4 ~: x" E& ?: yfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
: L& ~, H, }" f k! }! V- }. r6 ufaster than the best man in the same sport, which sounds impossible. Putting
$ [; m; c( b4 z# P6 zaside the gender argument, I believe this is still a leading question that
J7 F& v4 H$ S1 u0 mimplies to the reader that there is something fishy going on.9 m7 h# p/ I9 \1 R4 d2 E5 ^8 ^# G
: {$ p0 f2 q( w! j" e" TFourth is another example of cherry-picking. In the same event, there are+ Q5 R5 z9 E! \
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
( i) g0 I4 I/ P9 L1 t. E2 z0 @s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
; r0 ` S9 e/ t) F9 f), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
! c) ]8 B9 `+ M |9 [$ Tout, if we are just talking about the last 50 metres in a 400-metre IM,7 t+ j6 p% q- g% g+ H5 O
Lochter is not the example I would have used if I were the author. What kind2 I; p* X7 r7 H2 n
of scientific rigorousness is Callaway trying to demonstrate here? Is it% V5 z3 N8 ^2 G. N# t
logical that if Lochter is the champion, we should assume that he leads in0 l* D/ v$ Z/ X9 e4 Y8 W1 ]( Q. g
every split? That would be a terrible way to teach the public how science% N$ y% g6 y. U0 E" A3 x+ d% M
works.$ }( W! ~# L9 `* _4 d( {5 ~
) C N7 ~* u" m5 t) o, LFifth is the issue I oppose the most. Callaway quotes Ross Tucker and- z8 K% D2 F6 v0 [, `( G- h
implies that a drug test cannot rule out the possibility of doping. Is this) m. M! I8 S/ x7 W
kind of agnosticism what Nature really wants to teach its readers? By that8 a' I F8 M* H3 Q# B
standard, I estimate that at least half of the peer-reviewed scientific
+ u9 T, {7 ^* U' J, L: vpapers in Nature should be retracted. How can one convince the editors and
Z8 g+ V, x8 s* Freviewers that their proposed theory works for every possible case? One
8 S5 I/ r) x* h2 T! g# |4 Ccannot. One chooses to apply the theory to typical examples and to
+ q3 F6 r6 q, d, Ldemonstrate that in (hopefully) all scenarios considered, the theory works
- V0 h2 T* @1 M, `to a degree, and that that should warrant publication until a counterexample
9 b3 C+ C0 o. a# z6 Wis found. I could imagine that Callaway has a sceptical mind, which is
6 e- P7 P2 R, X5 bcrucial to scientific thinking, but that would be put to better use if he
# w3 S5 Y) I9 X xwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly1 [6 N( H0 Y. o3 `
advanced, non-detectable drug that the Chinese have come up with in the
4 L; n Z9 M Z. `3 Epast 4 years (they obviously did not have it in Beijing, otherwise why not0 ?0 B+ [$ l1 ?) i9 C2 d
use it and woo the audience at home?), based on data and rational derivation
1 v; H7 ]2 u6 F8 g7 o. O. This article, however, can be interpreted as saying that all athletes are
+ M1 ]& t' R3 p* G- Ldoping and the authorities are just not good enough to catch them. That may
0 e7 Z, Q2 _/ a, A+ M6 ^) ~6 F$ gbe true, logically, but definitely will not make the case if there is ever a
1 K7 A4 e3 t; |hearing by the governing body for water sports, FINA, to determine if Ye* @9 _ ?. U; Y/ T" H; B y/ M& {, b
has doped. To ask whether it is possible to obtain a false negative in a
; D5 s0 {6 z3 ^! |& r0 o9 l, B/ w8 zdrug test looks like a rigged question to me. Of course it is possible:8 M; n5 a" d9 B' s4 T# U4 J, h
other than the athlete taking a drug that the test is not designed to detect
3 c& E0 X( y( d6 L0 ^. U, anyone who has taken quantum 101 will tell you that everything is
! F. T: l1 E5 I& Hprobabilistic in nature, and so there is a probability that the drug in an+ F3 v3 |& S4 `# P! j% p( x
athlete’s system could tunnel out right at the moment of the test. A slight
& E S: B4 b- t. ^) c, r# nchance it may be, but should we disregard all test results because of it?
, f4 P e& W0 A/ I0 J- }& qLet’s be practical and reasonable, and accept that the World Anti-Doping3 z- O# u6 d) P9 V5 o; \
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
* K0 x8 I4 s" R* @+ L6 L" x/ A- veight years after the contest for future testing as technology advances.) J' y3 E7 f* N, G8 } z; f
Innocent until proven guilty, shouldn’t it be?0 g! s6 `" b s8 u+ [& [% A
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Sixth, and the last point I would like to make, is that the out-of- O" [) a) |: i
competition drug test is already in effect, which Callaway failed to mention* q3 W$ w3 W5 [+ {" H+ P; c
. As noted in the president of WADA’s press release, drug testing for: ?" [+ ]3 D) R+ `
Olympians began at least six months before the opening of the London
4 T3 H; d, O7 n! bOlympics. Furthermore, 107 athletes have been banned from this Olympics for: O8 [) F' O# @% ~0 N
doping. That may be the reason that “everyone will pass at the Olympic
* W+ e" H" Y, x5 ^: }. Lgames. Hardly anyone fails in competition testing” — those who did dope; D) W6 D6 u3 C& g
have already been caught and sanctioned. Callaway is free to suggest that a0 a' g y, `+ f0 V2 N: _" {/ G
player could have doped beforehand and fooled the test at the game, but this" x" y9 y( m2 r t k6 e' d, J5 L
possibility is certainly ruled out for Ye.
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8 @9 Z& B1 T D% YOver all, even though Callaway did not falsify any data, he did (
$ h/ j) J! v% C+ kintentionally or not) cherry-pick data that, in my view, are far too
( {/ H0 G, k) i/ f1 `suggestive to be fair and unbiased. If you want to cover a story of a
, t I' s( T9 [0 {suspected doping from a scientific point of view, be impartial and provide
+ q0 V' W1 s: E6 Q( c& S# ]all the facts for the reader to judge. You are entitled to your6 C% U/ d# `9 @
interpretation of the facts, and the expression thereof in your piece,5 e; ?/ \3 [! T
explicitly or otherwise, but showing only evidence that favours your
9 I" R& s u9 Dargument is hardly good science or journalism. Such an article in a journal
& B- ^: a* q O3 r+ H' q4 ^such as Nature is not an appropriate example of how scientific research or
1 g3 r3 h$ Z) E Lreporting should be done. |
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