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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 S0 |6 J: ~2 q, V
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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; Z u5 i0 e. bhttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html4 }0 h) d" |# S
: f+ L6 U' l- x' 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
/ \) r2 ^2 _0 E( ^. S1 D A4 G, regard as one of the most prestigious and influential physical-science, K6 n$ r: b! t) ~
magazines — publish a thinly veiled biased article like this. Granted, this9 z/ t( L3 X0 S2 Y
is not a peer-reviewed scientific article and did not go through the! _) D8 [9 B- M, h$ @& H& Y5 i. H: r2 E
scrutiny of picking referees. But to serve as a channel for the general
$ | y) h W G' W! g+ T- Wpopulace to be in touch with and appreciate science, the authors and editors; c: D3 f8 O- L/ z* [. q
should at least present the readers with facts within the proper context,
- j+ g" z* J6 D; l% y% ?- x9 _: ?- s: awhich they blatantly failed to do.; d1 i! W. [! a
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First, to identify Ye’s performance increase, Ewen Callaway compared her
; Z$ V" ~" k7 J, z' }# Z6 ROlympic 400-metre IM time with her performance at the World Championships in
' B$ Q% L* w N. e2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “7 l) }% ]2 S q* h( c0 l
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous: z! C M, d! h7 q: A H
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
& V5 e! p7 s; l, ximprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
# `# U, c4 q4 R- w' }. ^+ D1 adifference between the gold and silver medal, I see no reason for 5.38 s to
) {" X7 Y! i# E' l# h6 n( gbe treated as 7 s.) I, C; X J1 l' z( I: q
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Second, as previously pointed out, Ye is only 16 years old and her body is) e% S/ W( x. e! u" O; C7 `
still developing. Bettering oneself by 5 seconds over two years may seem
_/ ~9 D) ?3 Z& |8 h9 V! gimpossible for an adult swimmer, but it certainly happens among youngsters.
. i$ A6 B% v6 Q2 {An interview with Australian gold medallist Ian Thorpe revealed that his 400. Y, R- r) d3 t' k. f7 M
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.2 s' B4 Q: k+ V+ W9 H. [. ?3 ?
For regular people, including Callaway, it may be hard to imagine what an
5 p0 F. w) R, I/ z) `elite swimmer can achieve as he or she matures and undergoes scientific and0 f9 S$ m( R" ^0 r1 c& S' l
persistent training. But jumping to the conclusion that it is “anomalous”
9 U5 i. E9 @4 E& o# V! @0 |) {based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.) K2 \- H4 p: i9 v! ~" d+ k
U8 o" V( _; w1 K' V7 {( a. U
Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook, U3 i% [4 I% ~$ p, ^
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in2 o. r2 Z0 _! f( p* W2 Y. P
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so5 A. ~. z2 s. n S' S1 G0 |
he chose not to push himself too hard and to conserve his energy for later
8 J1 F5 w' a2 Vevents (whether this conforms to the Olympic spirit and the ‘use one’s
8 \- O6 Q! l [8 O( ]best efforts to win a match’ requirement that the Badminton World
4 v8 d- t4 f! t; W3 p: YFederation recently invoked to disqualify four badminton pairs is another
' ]! b$ k: K3 T' w* S5 }4 mtopic worth discussing, though probably not in Nature). Ye, on the other( d X* C R9 Z v2 n, _; ~( ~' i
hand, was trailing behind after the first 300 metres and relied on freestyle3 M5 k, k, p7 O" o" k. [( |, w6 f/ s
, in which she has an edge, to win the race. Failing to mention this
; E; [/ b0 r5 F( C; ~strategic difference, as well as the fact that Lochte is 23.25 seconds% F7 j+ Z- H7 ~: v
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
7 B; t3 I2 |3 g% xfaster than the best man in the same sport, which sounds impossible. Putting
3 p2 [- q1 s1 t- ?. paside the gender argument, I believe this is still a leading question that
6 u2 _- q" E! uimplies 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
/ [2 o4 |% h. q+ j) @9 L5 Nfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
' M. y; O# L( |7 @/ X& S1 X9 l- ss) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
3 W, n) w7 K6 J2 J$ j1 l), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
: a( K9 i1 @$ [4 sout, if we are just talking about the last 50 metres in a 400-metre IM,! Q! p( T& [$ c5 k% W0 T7 G, @
Lochter is not the example I would have used if I were the author. What kind+ K% ?% y3 \! Q, }. T
of scientific rigorousness is Callaway trying to demonstrate here? Is it" X1 A: B7 M, x7 Q6 I4 O
logical that if Lochter is the champion, we should assume that he leads in+ r% u! H6 A! W
every split? That would be a terrible way to teach the public how science
& k' t4 I# q4 T, H6 t$ Xworks.
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' c2 b/ a+ V$ c: x5 c8 T/ o5 \7 AFifth is the issue I oppose the most. Callaway quotes Ross Tucker and% B' G9 F/ D/ |. i% C4 r( Q$ Z. Y
implies that a drug test cannot rule out the possibility of doping. Is this
) v+ b6 W; a$ |8 B8 _kind of agnosticism what Nature really wants to teach its readers? By that
% N$ X- {! V: u3 n* u4 ^* g. [% estandard, I estimate that at least half of the peer-reviewed scientific h- @4 s6 Z: `5 u( c; [3 ]
papers in Nature should be retracted. How can one convince the editors and# D3 o- ~$ w6 E; l0 ~" i
reviewers that their proposed theory works for every possible case? One% Q# Z' P( R& H$ F9 X: G: F
cannot. One chooses to apply the theory to typical examples and to' I- E% s' V4 t" z# R: Y9 m2 q4 L
demonstrate that in (hopefully) all scenarios considered, the theory works
- B* y+ j% F) \7 W1 i9 Y7 P; Hto a degree, and that that should warrant publication until a counterexample
4 D. I) v7 h; sis found. I could imagine that Callaway has a sceptical mind, which is$ N2 c6 e4 I# ~) Y2 p; G% t( t- ?' O
crucial to scientific thinking, but that would be put to better use if he3 m z: f; I- n. }0 x$ p
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly* e8 o6 ^; o i2 }" L4 q
advanced, non-detectable drug that the Chinese have come up with in the8 e1 g$ |+ {* P
past 4 years (they obviously did not have it in Beijing, otherwise why not% ?% |, p4 m; y3 ^% U
use it and woo the audience at home?), based on data and rational derivation: D+ g) `/ P" }5 Q5 |+ g' W( B
. This article, however, can be interpreted as saying that all athletes are* C; W9 D b# {" N( z4 a' r$ ~) _
doping and the authorities are just not good enough to catch them. That may) b1 H/ ~8 Y& _ e4 E- f9 B9 T4 R
be true, logically, but definitely will not make the case if there is ever a
# x) I+ s( {' t$ d% D' R9 Uhearing by the governing body for water sports, FINA, to determine if Ye
, [: ^4 p, H6 `9 T! ?7 chas doped. To ask whether it is possible to obtain a false negative in a1 K. d6 R+ F: q: l% F
drug test looks like a rigged question to me. Of course it is possible:* n: ^* e0 t5 r6 ^; X, H2 ?, L
other than the athlete taking a drug that the test is not designed to detect
$ a q$ v3 M6 L; E, E( @, anyone who has taken quantum 101 will tell you that everything is3 y; H( p, a2 ?- Y5 U5 L$ D
probabilistic in nature, and so there is a probability that the drug in an
4 J! {2 p7 k; C* rathlete’s system could tunnel out right at the moment of the test. A slight
( }$ Q+ J" u; j6 Hchance it may be, but should we disregard all test results because of it?
- j! R% m" l' c; A3 qLet’s be practical and reasonable, and accept that the World Anti-Doping$ l* P5 p, O$ D
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
" l1 \+ [6 b2 A* W- W: @ r1 W+ zeight years after the contest for future testing as technology advances.
, c& d- ~& ~/ `& a9 n% g) uInnocent 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-' ]( n4 B8 ^* N
competition drug test is already in effect, which Callaway failed to mention
& ]% l$ v1 U! [. u2 i! \3 t) b. As noted in the president of WADA’s press release, drug testing for
4 C9 I4 J8 Z8 O. j" JOlympians began at least six months before the opening of the London0 h, M$ ~( R8 X
Olympics. Furthermore, 107 athletes have been banned from this Olympics for9 M& ^* e+ u( ]2 x w/ N# D
doping. That may be the reason that “everyone will pass at the Olympic4 \% k. X5 G$ g! s$ e
games. Hardly anyone fails in competition testing” — those who did dope6 u/ k; k9 l* I4 ]
have already been caught and sanctioned. Callaway is free to suggest that a! p2 J# d" z" r2 O
player could have doped beforehand and fooled the test at the game, but this* q! I8 t5 f$ m
possibility is certainly ruled out for Ye.: ^6 k C; W# d; O& |3 v. {3 _
6 V" f. }- ]" Z4 E8 n, gOver all, even though Callaway did not falsify any data, he did (! e7 _. e s- L
intentionally or not) cherry-pick data that, in my view, are far too$ Z5 q# ~' Y( \% g T6 ]: m/ ^
suggestive to be fair and unbiased. If you want to cover a story of a
9 F3 _8 h8 \" G( k6 X6 Osuspected doping from a scientific point of view, be impartial and provide& q# s0 q" Q0 |9 {! g- G
all the facts for the reader to judge. You are entitled to your5 A6 h. U% |6 `5 q% a: U' Q3 k% }
interpretation of the facts, and the expression thereof in your piece, {" _# i; A" k9 F9 m+ D. _7 ]3 J
explicitly or otherwise, but showing only evidence that favours your; c9 \) h6 E) g8 |% f3 ]
argument is hardly good science or journalism. Such an article in a journal+ o- W6 d2 a6 `) X5 f
such as Nature is not an appropriate example of how scientific research or& w% ]' v. q$ y. i5 [
reporting should be done. |
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