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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 JIANG8 J4 ~7 O- n9 _/ q+ X
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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7 G+ R: f: N8 ghttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html0 y) {! Q8 W4 x) E( j9 m
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FROM 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
9 j" u3 `* V( F2 r/ M2 e4 \, regard as one of the most prestigious and influential physical-science
; S) d+ j/ F$ F8 G6 e! G# N+ Bmagazines — publish a thinly veiled biased article like this. Granted, this
* P* r/ |5 V6 B2 `: Dis not a peer-reviewed scientific article and did not go through the' A) z, u; c5 @9 A
scrutiny of picking referees. But to serve as a channel for the general9 E! S; g$ O. J' r( V
populace to be in touch with and appreciate science, the authors and editors% q0 l+ o. c6 N/ z" y
should at least present the readers with facts within the proper context,' Z/ k% C8 d3 r+ |: j5 b
which they blatantly failed to do.
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9 n+ E. v" M' `5 Y* S p6 x: e0 x, H+ XFirst, to identify Ye’s performance increase, Ewen Callaway compared her
B9 O1 q* O' o5 E- {Olympic 400-metre IM time with her performance at the World Championships in- D2 t( T' e# T" K' N
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
/ u# V; J6 i$ A8 E1 c. w w0 manomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
6 S E# e. [% ]* \- apersonal best was 4:33.79 at the Asian Games in 2010. This leads to an2 y0 w4 ^% J5 L! |
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the' M" y% d$ {3 E4 y6 q8 j$ s) X/ H
difference between the gold and silver medal, I see no reason for 5.38 s to
' d4 N4 I7 V9 A% `be treated as 7 s.7 X! w# o1 |5 e0 g, A6 N0 Y
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Second, as previously pointed out, Ye is only 16 years old and her body is
! _0 b O, B+ N6 T& z7 istill developing. Bettering oneself by 5 seconds over two years may seem. b$ m( [9 |( K( T# j1 _
impossible for an adult swimmer, but it certainly happens among youngsters.
2 R9 r& ]. B# ]5 P. OAn interview with Australian gold medallist Ian Thorpe revealed that his 400: G: k- C5 Q; }# L+ d- L0 n
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.5 x5 r9 W/ r; |
For regular people, including Callaway, it may be hard to imagine what an* K9 t, c8 \( X) x7 x
elite swimmer can achieve as he or she matures and undergoes scientific and5 K3 W3 s1 l) ]) t
persistent training. But jumping to the conclusion that it is “anomalous”+ k* r/ B+ I4 T- r( ?. @. i; O
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.; i! y: {9 S% t! R
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook0 k% V* q- N- S" w3 m/ Z& x
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in& D& Q3 u: w, k8 k. `
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
C# `, d. O+ H- G G! ohe chose not to push himself too hard and to conserve his energy for later1 N3 [0 k$ D+ d+ ~8 \" f- Q' J
events (whether this conforms to the Olympic spirit and the ‘use one’s W- i' _* A9 u2 P/ I& F
best efforts to win a match’ requirement that the Badminton World$ }0 x. m: |' N9 `8 f6 p( Q7 O# ]
Federation recently invoked to disqualify four badminton pairs is another
; b9 f4 }6 l5 q ytopic worth discussing, though probably not in Nature). Ye, on the other
& v4 Z a6 B% j: thand, was trailing behind after the first 300 metres and relied on freestyle# d( i) O8 Y$ U/ \7 R- T
, in which she has an edge, to win the race. Failing to mention this0 m$ b, f) n m: m2 B
strategic difference, as well as the fact that Lochte is 23.25 seconds) }+ y4 G8 u, L0 v7 O
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
# j. U- a; Z3 \4 Lfaster than the best man in the same sport, which sounds impossible. Putting
+ U8 q e' M [aside the gender argument, I believe this is still a leading question that# j8 ]. O. _: @2 p; H
implies to the reader that there is something fishy going on.' U, T* W2 I4 _
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Fourth is another example of cherry-picking. In the same event, there are% {& Q0 I9 ]0 J( L j
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.931 O, Z7 o5 f7 y2 l
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
2 \8 C* X& ~# `' D), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
: T& I1 v, |3 Cout, if we are just talking about the last 50 metres in a 400-metre IM,8 J7 I4 F, X- W& v' w* a, L8 _: L& {
Lochter is not the example I would have used if I were the author. What kind
A; k3 R. f4 ~: d# D. _of scientific rigorousness is Callaway trying to demonstrate here? Is it+ \$ o$ M& }3 ^( W6 }
logical that if Lochter is the champion, we should assume that he leads in
$ c% J5 w! {; L" J: ]) Oevery split? That would be a terrible way to teach the public how science2 F. X1 f9 e: V
works.2 W+ h. s' B0 g7 v1 m
; ~) ?5 B, a; V' w9 o( T- q! `Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
' P1 j7 _( Z: ` S3 B5 gimplies that a drug test cannot rule out the possibility of doping. Is this! d% c# t1 o3 ?3 ^
kind of agnosticism what Nature really wants to teach its readers? By that4 T0 r2 c. ?. d, k6 G, |2 m, q
standard, I estimate that at least half of the peer-reviewed scientific. s3 y$ Y$ f( p* E% L* f
papers in Nature should be retracted. How can one convince the editors and% C7 O5 m6 d# S' k4 v" F
reviewers that their proposed theory works for every possible case? One
" [/ l" c3 B7 ~& o* c) D, j: u! `cannot. One chooses to apply the theory to typical examples and to* F4 T) j, L9 z% `* t. h, X, D0 H
demonstrate that in (hopefully) all scenarios considered, the theory works0 f, r$ Q! e' N7 @+ P9 Z+ V
to a degree, and that that should warrant publication until a counterexample0 |: Y" g4 T! i7 z
is found. I could imagine that Callaway has a sceptical mind, which is5 v' h1 C, d3 ]. W4 l [8 A
crucial to scientific thinking, but that would be put to better use if he
& x: [$ i) u/ rwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
5 G' e1 C" J# a# A2 C0 X) C# U8 jadvanced, non-detectable drug that the Chinese have come up with in the
! a: S: I6 ]% T8 S! K" @& t& y4 `; wpast 4 years (they obviously did not have it in Beijing, otherwise why not
- M i# ^/ K" _, x6 z" e* \1 L6 |use it and woo the audience at home?), based on data and rational derivation& `) C" w6 @. e) D: g5 L8 \
. This article, however, can be interpreted as saying that all athletes are
8 T% V U: ^3 `, l/ Ddoping and the authorities are just not good enough to catch them. That may
4 }; x. f* q( k' d5 X( B6 qbe true, logically, but definitely will not make the case if there is ever a* e0 @ T6 R8 r( {2 W) _1 Y2 j( c
hearing by the governing body for water sports, FINA, to determine if Ye
9 a' u& A+ `( Z, y' e8 U2 S l/ ~has doped. To ask whether it is possible to obtain a false negative in a
* _( o9 i4 l2 b! H) `drug test looks like a rigged question to me. Of course it is possible:3 H6 B$ ^+ R* w. P; ^1 w1 h
other than the athlete taking a drug that the test is not designed to detect
; M, a( X I0 L* X, anyone who has taken quantum 101 will tell you that everything is
8 ]' L9 \, a: j$ x7 _% Nprobabilistic in nature, and so there is a probability that the drug in an3 ]. p; C- Z0 L
athlete’s system could tunnel out right at the moment of the test. A slight
$ d$ }( }+ C" Z; W& Cchance it may be, but should we disregard all test results because of it?; V3 F3 a0 }* ~
Let’s be practical and reasonable, and accept that the World Anti-Doping
0 ?. W" u% X( I$ k: t* Z4 H* oagency (WADA) is competent at its job. Ye’s urine sample will be stored for
0 x# `& [% c3 t( y$ Q3 {) _eight years after the contest for future testing as technology advances.
$ ]/ k2 a, @+ D( a% DInnocent 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-1 p1 Q1 O8 Q# I* @
competition drug test is already in effect, which Callaway failed to mention! z) t, w( C# `4 C4 {% T# V
. As noted in the president of WADA’s press release, drug testing for4 Y7 F% u& q: |* F9 Y4 z" u+ B0 A# k: K
Olympians began at least six months before the opening of the London
, T) B5 T! x% G0 f" K% Y: n; hOlympics. Furthermore, 107 athletes have been banned from this Olympics for1 j+ ?/ W% w) S; Y
doping. That may be the reason that “everyone will pass at the Olympic# I6 W& x& m, z' s$ ?4 }% G
games. Hardly anyone fails in competition testing” — those who did dope# K! K' s; d3 T6 o
have already been caught and sanctioned. Callaway is free to suggest that a
5 G: l$ c2 v( F# ^1 ]8 q$ lplayer could have doped beforehand and fooled the test at the game, but this
! ]: ?4 X6 d4 k( B8 V. u( _possibility is certainly ruled out for Ye.
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2 L: I5 A4 [' ~1 b6 Y6 d& i+ gOver all, even though Callaway did not falsify any data, he did (+ X4 _. [/ {6 Y1 E
intentionally or not) cherry-pick data that, in my view, are far too
! ~3 }; a, f0 ?: ?( dsuggestive to be fair and unbiased. If you want to cover a story of a O$ e4 h: a7 g" v- ^1 g8 R7 O
suspected doping from a scientific point of view, be impartial and provide
F) s4 _2 o: S& R2 mall the facts for the reader to judge. You are entitled to your
a$ @! b2 {" ?6 [- z; x) t3 Iinterpretation of the facts, and the expression thereof in your piece,
1 |* p) P4 Y# f2 C# Zexplicitly or otherwise, but showing only evidence that favours your* O+ {. v& e% J$ R
argument is hardly good science or journalism. Such an article in a journal
$ i. u* P8 J$ E: X' T& Ksuch as Nature is not an appropriate example of how scientific research or
( ^- V. a5 r2 A Lreporting should be done. |
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