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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. k" z: K8 ]. {4 i! q1 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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0 O; Q+ b3 ?+ t4 K% g1 thttp://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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It is a shame to see Nature — which nearly all scientists, including myself% q7 I% P8 U' w( t D8 e# L
, regard as one of the most prestigious and influential physical-science
1 n0 x3 r8 r, L) Hmagazines — publish a thinly veiled biased article like this. Granted, this( `8 G m' V" D: |. f; {' Q
is not a peer-reviewed scientific article and did not go through the
- z9 J6 |& A2 s) ~! V7 |scrutiny of picking referees. But to serve as a channel for the general
. a4 B! I$ m% Ypopulace to be in touch with and appreciate science, the authors and editors/ O& B. y8 T' I+ t6 q; @4 Q
should at least present the readers with facts within the proper context,
9 v" w4 n% C/ G! k9 O+ ewhich they blatantly failed to do.+ ?- i% j9 ~8 O8 o
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First, to identify Ye’s performance increase, Ewen Callaway compared her M/ s5 i" a( v* {1 B
Olympic 400-metre IM time with her performance at the World Championships in2 s3 g; O/ L0 x2 G, j: G+ N A: X
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “! v, ^5 v# f* |$ n& T/ A
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
0 _6 y8 K, q/ Y! P8 Ypersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
- E! |! Y, O; `4 O4 Nimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the% F" j0 a5 k8 O4 M0 p0 n) _
difference between the gold and silver medal, I see no reason for 5.38 s to2 P6 M5 I8 E, ~
be treated as 7 s.
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$ o* C4 g5 q( C! b0 _Second, as previously pointed out, Ye is only 16 years old and her body is
8 z" [7 Y% n+ `6 n; vstill developing. Bettering oneself by 5 seconds over two years may seem
! V# I2 R6 n* k. l, u/ a+ himpossible for an adult swimmer, but it certainly happens among youngsters.. j, e, {+ U3 g ]" S' w
An interview with Australian gold medallist Ian Thorpe revealed that his 400
3 u0 A2 ] X8 O# Q9 _4 l-metre freestyle time improved by 5 seconds between the ages of 15 and 16.' ^' N3 U" O0 C0 E
For regular people, including Callaway, it may be hard to imagine what an$ @3 y' R6 |% Q& Q. C
elite swimmer can achieve as he or she matures and undergoes scientific and( y" Q- A4 |8 k* F! Q+ \
persistent training. But jumping to the conclusion that it is “anomalous”* m7 ^ o+ v6 |
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
7 l- [( x: }. s) }+ m; pexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
. i9 o# r2 |1 ~& g6 Vthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
7 o4 }0 y- P: f$ F" Rhe chose not to push himself too hard and to conserve his energy for later
/ L' B" Z( E! k# x( E, L0 Jevents (whether this conforms to the Olympic spirit and the ‘use one’s% e$ L) O' x, o. W: S
best efforts to win a match’ requirement that the Badminton World" D% Q1 @; {( s- [, b
Federation recently invoked to disqualify four badminton pairs is another# N8 V5 n9 i! d; [0 ^
topic worth discussing, though probably not in Nature). Ye, on the other
& l5 L3 d- u3 L. e% ^# k8 Yhand, was trailing behind after the first 300 metres and relied on freestyle: J& d- Y- Q* A( `! n
, in which she has an edge, to win the race. Failing to mention this9 A2 U. k: l) u! Z4 N
strategic difference, as well as the fact that Lochte is 23.25 seconds
2 e) z; o9 U1 ?0 Tfaster (4:05.18) than Ye overall, creates the illusion that a woman swam6 i6 ?" X6 E7 v/ a% H, @+ T2 s5 M
faster than the best man in the same sport, which sounds impossible. Putting* C- A7 x* z' W4 k
aside the gender argument, I believe this is still a leading question that' h8 e( j+ t3 q/ k
implies to the reader that there is something fishy going on.1 x7 J$ G% u2 w9 V9 w6 f
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Fourth is another example of cherry-picking. In the same event, there are
4 A: I( t& V: j2 `( {four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93% q3 t7 @) T6 C9 x' D6 Y& Y5 f
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
3 W2 J2 c: v. V# E: O1 `6 {7 _$ P# m), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns+ { L4 X* J) C9 O3 a! e [
out, if we are just talking about the last 50 metres in a 400-metre IM," [7 \* E7 K# ~/ C* w) n1 x# _& T
Lochter is not the example I would have used if I were the author. What kind
7 Q/ a6 J0 y/ ^( g7 d, Eof scientific rigorousness is Callaway trying to demonstrate here? Is it
1 g4 g3 x8 _ t, y. Mlogical that if Lochter is the champion, we should assume that he leads in/ H2 e- T, Q4 ^
every split? That would be a terrible way to teach the public how science
( r: \& k' D% i6 }works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
( h4 c# U3 B. P0 T9 I5 ~* qimplies that a drug test cannot rule out the possibility of doping. Is this
- _' Z/ y2 e& l6 c0 j2 g5 G9 @1 Dkind of agnosticism what Nature really wants to teach its readers? By that4 ? k( q) y0 B8 I: G6 \
standard, I estimate that at least half of the peer-reviewed scientific
) p1 s6 d* ^* G" _papers in Nature should be retracted. How can one convince the editors and
9 P; \0 ]' V, o. i2 Zreviewers that their proposed theory works for every possible case? One
: d# y" B1 n+ [6 ucannot. One chooses to apply the theory to typical examples and to0 h6 u1 [- h2 u
demonstrate that in (hopefully) all scenarios considered, the theory works
( r" a2 N |( G1 {to a degree, and that that should warrant publication until a counterexample
' ]& g; E# H) M. ?is found. I could imagine that Callaway has a sceptical mind, which is
( K0 p4 I- |8 @2 Z/ u, ecrucial to scientific thinking, but that would be put to better use if he( A- h2 V2 i" y! r. @' Y3 D
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
# W, Y* @& A, f- Q$ Uadvanced, non-detectable drug that the Chinese have come up with in the4 G& N1 O' [; }9 [2 r2 z
past 4 years (they obviously did not have it in Beijing, otherwise why not
6 O9 Z3 a7 a4 R. l Tuse it and woo the audience at home?), based on data and rational derivation3 |/ ~" ?5 ?( ~ B
. This article, however, can be interpreted as saying that all athletes are# X& c+ H z2 a, |( I/ k+ i f' x
doping and the authorities are just not good enough to catch them. That may
- a+ \" ]3 ^1 S# p, {0 vbe true, logically, but definitely will not make the case if there is ever a
- W8 @6 m( ?. l7 A2 @hearing by the governing body for water sports, FINA, to determine if Ye+ _! Q9 I/ _. _& K2 s' a6 [
has doped. To ask whether it is possible to obtain a false negative in a
- Q/ V3 v5 i& l% Bdrug test looks like a rigged question to me. Of course it is possible:( d( O' x. P8 m1 m& M
other than the athlete taking a drug that the test is not designed to detect
) j8 c0 p; ]% g; |7 I6 I, anyone who has taken quantum 101 will tell you that everything is& F- X2 k* G* L. ?( G: m
probabilistic in nature, and so there is a probability that the drug in an9 _' u9 L" n2 C5 v
athlete’s system could tunnel out right at the moment of the test. A slight- |, ~2 H' K+ v+ C7 O
chance it may be, but should we disregard all test results because of it?
/ V' `3 n# F$ z+ J% w2 m4 e; xLet’s be practical and reasonable, and accept that the World Anti-Doping# `& D5 K2 `) T s1 ~" o
agency (WADA) is competent at its job. Ye’s urine sample will be stored for- f! Z; i9 p9 {7 q& [
eight years after the contest for future testing as technology advances.5 a2 Q0 w$ W$ k* M
Innocent 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-! {+ u: L/ E4 L* `0 A) d* x8 v
competition drug test is already in effect, which Callaway failed to mention
! |5 k5 w* [/ [9 V4 g1 N, V. As noted in the president of WADA’s press release, drug testing for
8 s+ `1 J6 i0 u1 |2 S5 ^8 k! eOlympians began at least six months before the opening of the London. w) T; c- H% }8 c' V9 O7 F8 G, P
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
2 W! p! P( v8 F' Qdoping. That may be the reason that “everyone will pass at the Olympic
4 t9 e/ l% o3 X7 p* r) m$ zgames. Hardly anyone fails in competition testing” — those who did dope$ w q# g5 o |# @/ S# q: ~
have already been caught and sanctioned. Callaway is free to suggest that a
4 i7 I4 S. L$ }1 i3 X2 Lplayer could have doped beforehand and fooled the test at the game, but this
6 F T. w: G- T- j" Epossibility is certainly ruled out for Ye.# j; H2 f5 b2 J3 z
0 q' g. i5 s+ t8 ~Over all, even though Callaway did not falsify any data, he did (" x! h2 z: U6 p( D. _
intentionally or not) cherry-pick data that, in my view, are far too
) t" P1 b: c) }! Esuggestive to be fair and unbiased. If you want to cover a story of a
& {% U* k6 U% tsuspected doping from a scientific point of view, be impartial and provide
" E% z: s* T, p0 |: I3 e/ p: \all the facts for the reader to judge. You are entitled to your; h! u1 G. {/ |( k2 L6 R
interpretation of the facts, and the expression thereof in your piece,* o$ _ R1 s6 \7 o
explicitly or otherwise, but showing only evidence that favours your
: p; Y2 r/ j5 B( U8 G i8 Yargument is hardly good science or journalism. Such an article in a journal
( ]% U: w! ~. Y) qsuch as Nature is not an appropriate example of how scientific research or. Q. t8 [ ~: V9 L
reporting should be done. |
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