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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
5 m6 S: C2 S# f5 k" ~7 [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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. j% R- C8 n4 ^ Qhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html3 i- ?+ G& c- C3 s1 m4 G, d. C, F
0 ~5 D" D W3 TFROM LAI JIANG, Department of Chemistry, University of Pennsylvania" a9 o! e2 j$ Y& G& Y) T
/ }8 i! E8 A. BIt is a shame to see Nature — which nearly all scientists, including myself4 l$ k1 V% Q& v1 m
, regard as one of the most prestigious and influential physical-science: I; t' y! @$ o* H2 \& b
magazines — publish a thinly veiled biased article like this. Granted, this
# B5 X3 B" _! O9 `+ o# F: ois not a peer-reviewed scientific article and did not go through the% Q% f2 y. u. y# n& S b
scrutiny of picking referees. But to serve as a channel for the general
- }. R: i9 M4 [; ~. p% H8 Ypopulace to be in touch with and appreciate science, the authors and editors
3 T: J6 @) ~3 G3 }8 p9 _# sshould at least present the readers with facts within the proper context,
7 A; H; h7 S! ~which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
; `& P* \1 A$ L' B9 |( N2 V! W. v$ gOlympic 400-metre IM time with her performance at the World Championships in3 h; B. ^1 \1 R; B& X$ T
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “7 g( r5 ^7 A! [8 x! n. k
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
& U! q% `2 R" @personal best was 4:33.79 at the Asian Games in 2010. This leads to an
3 O" a5 ?& u2 H, Oimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
3 F& `/ {. |0 z9 P# L/ `5 n' `difference between the gold and silver medal, I see no reason for 5.38 s to9 e3 S+ q( z6 i2 J, t
be treated as 7 s.- b4 N, ~5 G) j+ D1 V
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Second, as previously pointed out, Ye is only 16 years old and her body is1 H/ W$ e5 a; l! S6 f
still developing. Bettering oneself by 5 seconds over two years may seem0 q- C" S0 N+ L1 l- O& z3 S4 O6 |; D- ~
impossible for an adult swimmer, but it certainly happens among youngsters.
& n. ~4 P1 B. f- ?" k+ ]An interview with Australian gold medallist Ian Thorpe revealed that his 400$ O* G5 n! }) F" L
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
- v6 W5 i7 `( O0 N6 ]' EFor regular people, including Callaway, it may be hard to imagine what an( n. M. x9 m6 O! u
elite swimmer can achieve as he or she matures and undergoes scientific and
% r2 B7 i4 N# t Hpersistent training. But jumping to the conclusion that it is “anomalous”
9 p6 b) `$ q8 S: }' nbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.4 u2 `9 L0 {8 I
4 b( q, }( }5 g" _# I" nThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
/ d$ r/ J1 F$ i3 y. Vexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
# b$ i' c, U% O3 y3 O$ {( Bthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so0 g) x/ T+ B' D2 Q
he chose not to push himself too hard and to conserve his energy for later5 h& ~) a3 E; }2 U! W+ L$ W
events (whether this conforms to the Olympic spirit and the ‘use one’s, u% [) Q0 V3 |) W" w
best efforts to win a match’ requirement that the Badminton World
( B/ x, n" E8 G/ B+ l ~: CFederation recently invoked to disqualify four badminton pairs is another
4 G5 a% }! |+ N8 m, ptopic worth discussing, though probably not in Nature). Ye, on the other7 q# ?! ?3 O/ m3 d( q
hand, was trailing behind after the first 300 metres and relied on freestyle
2 U& @' x8 g* }, in which she has an edge, to win the race. Failing to mention this
/ }9 P1 t8 ^0 e5 @1 ^& ?strategic difference, as well as the fact that Lochte is 23.25 seconds
# D# J& H! u1 s3 O7 ~5 J" m: `faster (4:05.18) than Ye overall, creates the illusion that a woman swam
+ Y8 h* E, o. x; V$ b9 afaster than the best man in the same sport, which sounds impossible. Putting. N' P) F9 s* ~ `$ r
aside the gender argument, I believe this is still a leading question that
1 g! D' r1 L" o5 Eimplies to the reader that there is something fishy going on.
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Fourth is another example of cherry-picking. In the same event, there are" o3 ^1 N7 _" `# y, S1 D* S9 H$ M
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93! j2 F# b. N7 C# T& v: O
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s" g5 U6 |: ]6 E% j4 C/ h
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns) ?+ g3 p# a* s% \5 Z. c; |
out, if we are just talking about the last 50 metres in a 400-metre IM,9 A, A9 N% N' J) d* C
Lochter is not the example I would have used if I were the author. What kind
) P' n9 g6 ~2 r7 `of scientific rigorousness is Callaway trying to demonstrate here? Is it/ n0 U; r4 k* t9 G# H6 r
logical that if Lochter is the champion, we should assume that he leads in7 g w# D! j" [
every split? That would be a terrible way to teach the public how science' _2 K2 ?5 h6 F5 V& M+ S" y
works.
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z7 W7 ?8 \4 \Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
+ j \; R2 I+ Q8 Wimplies that a drug test cannot rule out the possibility of doping. Is this' v9 m+ V& Z( ]* G3 y
kind of agnosticism what Nature really wants to teach its readers? By that
% Y; S5 W. Y: I5 a0 D5 v5 J) @standard, I estimate that at least half of the peer-reviewed scientific
* T- ]/ _! N/ Hpapers in Nature should be retracted. How can one convince the editors and/ S* @4 c/ C& M0 I5 ?0 a$ l1 G
reviewers that their proposed theory works for every possible case? One
9 u' }* M6 a7 z; s& P- M! Bcannot. One chooses to apply the theory to typical examples and to
* I( [! ]' h- g1 d* g8 m( _4 Cdemonstrate that in (hopefully) all scenarios considered, the theory works( N u$ Y8 E: x f3 K N3 w0 ^
to a degree, and that that should warrant publication until a counterexample
0 H. F6 d+ ~9 V, s0 G; gis found. I could imagine that Callaway has a sceptical mind, which is# n: q: b' x$ X& `5 [
crucial to scientific thinking, but that would be put to better use if he
. q! A w5 \8 d) D$ c. y; {wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly8 Y. i; V: ]7 {; Y, P
advanced, non-detectable drug that the Chinese have come up with in the
6 D0 k8 Y3 ?9 L0 p/ \past 4 years (they obviously did not have it in Beijing, otherwise why not
, D; u" W7 t( k+ V: ?use it and woo the audience at home?), based on data and rational derivation7 q% T4 o+ z' \3 }2 ]' o% s7 X
. This article, however, can be interpreted as saying that all athletes are
* p" y) i) p6 b7 B9 D0 Odoping and the authorities are just not good enough to catch them. That may
- U) r1 O' V( Q& x' O2 k7 ~- e! H {be true, logically, but definitely will not make the case if there is ever a
3 M n4 k/ s& y4 ]1 g, Rhearing by the governing body for water sports, FINA, to determine if Ye
3 ^+ Z+ Z6 D+ o U' n; e! [, a3 ihas doped. To ask whether it is possible to obtain a false negative in a
+ d3 X; [. T2 ^6 Xdrug test looks like a rigged question to me. Of course it is possible:
- j0 m s$ ?* Jother than the athlete taking a drug that the test is not designed to detect
6 t7 E3 V, ?& q; \' ~2 \, anyone who has taken quantum 101 will tell you that everything is0 T) `9 B* D( p' B* X% h4 q5 a6 e
probabilistic in nature, and so there is a probability that the drug in an
2 f: t$ ?$ J. T0 A* `/ J4 j+ |: }athlete’s system could tunnel out right at the moment of the test. A slight! @! _& W1 W' j. X& z, z
chance it may be, but should we disregard all test results because of it?
8 E6 Q$ B0 k/ A, R* i* t, C: DLet’s be practical and reasonable, and accept that the World Anti-Doping
7 G0 N& i, b6 P3 |$ b! ^1 eagency (WADA) is competent at its job. Ye’s urine sample will be stored for
: b5 f6 Q+ O% l2 u* h q; beight years after the contest for future testing as technology advances.) X. e" w: i( ]6 N
Innocent until proven guilty, shouldn’t it be?# i, M9 j. C, R S% j. M" O+ l" X. C
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Sixth, and the last point I would like to make, is that the out-of-0 @* E2 F9 [( d' {) T
competition drug test is already in effect, which Callaway failed to mention$ o0 R" G1 F; k: e3 {
. As noted in the president of WADA’s press release, drug testing for
+ B# i/ s# A& d% l8 fOlympians began at least six months before the opening of the London L( V) P2 F" e" R9 D) m" q' S
Olympics. Furthermore, 107 athletes have been banned from this Olympics for- v1 P% u! ?, W
doping. That may be the reason that “everyone will pass at the Olympic
: R7 _- z) e9 r2 C. Vgames. Hardly anyone fails in competition testing” — those who did dope
/ A, Q' s q& x, V$ N' B* K8 ehave already been caught and sanctioned. Callaway is free to suggest that a5 G1 d( `' u+ H: c
player could have doped beforehand and fooled the test at the game, but this6 t+ P) m! T6 q- A: x8 K, t ]
possibility is certainly ruled out for Ye.
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$ i5 N) x8 `1 lOver all, even though Callaway did not falsify any data, he did (
! P9 y: b/ G Q% \/ h b( Yintentionally or not) cherry-pick data that, in my view, are far too, T% ~8 ^- U% f) Y' k! Q# ]
suggestive to be fair and unbiased. If you want to cover a story of a
) H0 k/ q1 _ c0 Ysuspected doping from a scientific point of view, be impartial and provide# R/ L" Z [4 s; N0 m
all the facts for the reader to judge. You are entitled to your- p- J9 p) |1 P; u& a; Q
interpretation of the facts, and the expression thereof in your piece,( i7 z$ N, z/ _/ G q
explicitly or otherwise, but showing only evidence that favours your1 ?; ^5 E$ @4 z8 |3 | y+ c, U
argument is hardly good science or journalism. Such an article in a journal3 ~7 l0 M/ A. a9 r8 u
such as Nature is not an appropriate example of how scientific research or K1 d: r7 o; I. S8 P. z& J
reporting should be done. |
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