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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
. Q7 N3 ?+ ]4 D; D1 `如果是中国长大的,英语能到这种程度真是很不简单。& k: n: y$ n, B! S) O l
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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! S; h1 g: f! w: yFROM LAI JIANG, Department of Chemistry, University of Pennsylvania: l' I* U6 d* `# C8 U' N7 U( T
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It is a shame to see Nature — which nearly all scientists, including myself
2 \/ Y$ ^ P. D1 \6 y, regard as one of the most prestigious and influential physical-science
" k. z% [" l* z0 M* Q4 n2 Zmagazines — publish a thinly veiled biased article like this. Granted, this
# } Z; V# W; m8 Pis not a peer-reviewed scientific article and did not go through the
# t) V ^/ G5 `7 w/ V: }9 E, vscrutiny of picking referees. But to serve as a channel for the general
7 b! O2 Z$ e! V' f' N* Gpopulace to be in touch with and appreciate science, the authors and editors; ^& Z. v9 f# U$ ?( a# Z% }! O- E
should at least present the readers with facts within the proper context,
7 U9 Q; j+ [) D+ rwhich they blatantly failed to do.
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+ d7 B! `' T# l+ aFirst, to identify Ye’s performance increase, Ewen Callaway compared her$ E7 c8 n& D0 ?7 G& J# `
Olympic 400-metre IM time with her performance at the World Championships in! o, r, [ @+ N4 w+ B4 c
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “3 U. o7 A- \/ W) v/ w( B
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous1 ]: X9 \* j$ b2 o" P
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
; u% _ e7 F7 S& |improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
6 e( e! [& r% V2 h4 P% vdifference between the gold and silver medal, I see no reason for 5.38 s to/ r9 y( h+ N: N# B! M1 W1 T \
be treated as 7 s.6 u3 M8 Y8 [" g* Y& J$ ]( @- _/ w% S
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Second, as previously pointed out, Ye is only 16 years old and her body is1 n# f( c1 O/ ` ^. O% y! N
still developing. Bettering oneself by 5 seconds over two years may seem& [0 v3 E; H7 \7 J) b. I( q
impossible for an adult swimmer, but it certainly happens among youngsters.
; c3 R; R+ p, \+ r" N D1 u2 mAn interview with Australian gold medallist Ian Thorpe revealed that his 400* m% Q( B, y% v; @. O# \
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.& r# d- d/ J7 q: f: O5 n
For regular people, including Callaway, it may be hard to imagine what an
" t; }; _" L4 p$ \5 r% W, Z! Uelite swimmer can achieve as he or she matures and undergoes scientific and# `3 l9 q3 z5 b5 A! ^0 z3 W: O
persistent training. But jumping to the conclusion that it is “anomalous”; T' v \+ q+ c
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.5 K/ I7 K6 Y) {' F6 R0 A3 |7 _+ H
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
1 @" l/ O% @0 A qexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in" v+ t) m2 [) y; z) a8 f+ w& k2 ~
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so/ t) i% W$ o3 u- z6 H
he chose not to push himself too hard and to conserve his energy for later9 m7 G: G; b! ~9 b" ? `7 J G
events (whether this conforms to the Olympic spirit and the ‘use one’s
, ]/ @( M- H/ [/ I1 ~best efforts to win a match’ requirement that the Badminton World$ t0 M+ r1 H; X* R6 x
Federation recently invoked to disqualify four badminton pairs is another
: ]1 W. w+ c+ y: Ktopic worth discussing, though probably not in Nature). Ye, on the other3 i: s, }- o; u$ V9 w8 ?
hand, was trailing behind after the first 300 metres and relied on freestyle# a9 g" j$ {: B9 H- ~
, in which she has an edge, to win the race. Failing to mention this
/ q7 A" _' a2 [1 v$ f% e* @8 Jstrategic difference, as well as the fact that Lochte is 23.25 seconds) }8 C* H' q" E, {% h7 L8 M
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
, C# ~% _9 a) K6 efaster than the best man in the same sport, which sounds impossible. Putting- c3 ^! x( i J( Y
aside the gender argument, I believe this is still a leading question that8 b" h9 k; Y1 s
implies 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
9 j( @ S8 v) d; T' H- d- |four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93. i% p3 f; I0 [9 ^, ~( Z I
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s. k; l# k1 z8 p9 I5 r3 V
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
l7 f3 ]3 d8 T: tout, if we are just talking about the last 50 metres in a 400-metre IM,, N+ d! Y* w o, G- ?! ^
Lochter is not the example I would have used if I were the author. What kind& X: E$ `; _' x: ]3 H* L- y9 [% ]
of scientific rigorousness is Callaway trying to demonstrate here? Is it' S! o" O! x& `2 ~$ h/ z$ J$ b2 x7 {
logical that if Lochter is the champion, we should assume that he leads in
4 L* ]: L' f* K1 g" C- tevery split? That would be a terrible way to teach the public how science- E. I# i6 m, h6 K) K! W: b
works.
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; W+ W+ f' }3 BFifth is the issue I oppose the most. Callaway quotes Ross Tucker and5 o! v$ ~( s& `/ I
implies that a drug test cannot rule out the possibility of doping. Is this
! R; @) N4 \. [$ S$ ^$ Ukind of agnosticism what Nature really wants to teach its readers? By that& s1 p2 L; w; o& w
standard, I estimate that at least half of the peer-reviewed scientific
- h. m. x @4 R- g. m0 Bpapers in Nature should be retracted. How can one convince the editors and
+ A* ]5 X+ @% I2 [! Treviewers that their proposed theory works for every possible case? One
$ h! r4 T! m8 C& \, [cannot. One chooses to apply the theory to typical examples and to
4 c, W7 @; N6 z* w7 Sdemonstrate that in (hopefully) all scenarios considered, the theory works4 R- v" H9 N# A
to a degree, and that that should warrant publication until a counterexample/ h9 l" u3 e+ n% }
is found. I could imagine that Callaway has a sceptical mind, which is
8 j [: |5 B7 b% e( x# c9 i7 ncrucial to scientific thinking, but that would be put to better use if he
% u2 }* r6 K- vwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly- B% D" h* z1 ?9 i, j0 y
advanced, non-detectable drug that the Chinese have come up with in the3 l" j! B5 `+ \6 V9 |! S" a
past 4 years (they obviously did not have it in Beijing, otherwise why not
+ o. a* \' _; N+ f0 i: {, Huse it and woo the audience at home?), based on data and rational derivation9 e2 B w L, N& E6 O5 K+ M Q1 f
. This article, however, can be interpreted as saying that all athletes are
$ r8 N5 ]8 c3 k! l; idoping and the authorities are just not good enough to catch them. That may
/ \/ U& P9 q9 g8 w7 r8 V2 sbe true, logically, but definitely will not make the case if there is ever a: b) ?& n( H0 f) i1 j6 [+ {; M J
hearing by the governing body for water sports, FINA, to determine if Ye9 Q& {' L" i/ [4 Z0 e
has doped. To ask whether it is possible to obtain a false negative in a
( g) v" P% a7 y- V1 {: V* gdrug test looks like a rigged question to me. Of course it is possible:
- e, v* F& M# v+ \; j" u8 t6 hother than the athlete taking a drug that the test is not designed to detect
/ Q) n5 H& c: K" k, d4 U, anyone who has taken quantum 101 will tell you that everything is
. }$ t1 u+ r0 ^# v7 _. d* @' q7 lprobabilistic in nature, and so there is a probability that the drug in an
* f/ X( j: e2 l4 \' r' oathlete’s system could tunnel out right at the moment of the test. A slight
0 s8 o% n/ c* [1 `: i" wchance it may be, but should we disregard all test results because of it?
; k. f/ E( ~( v: q# _) ~Let’s be practical and reasonable, and accept that the World Anti-Doping
) _+ q" Z( M( d! Nagency (WADA) is competent at its job. Ye’s urine sample will be stored for$ H* f T4 ?) N2 l& b* c1 o+ P. p
eight years after the contest for future testing as technology advances.; ^0 F) X R% {9 z$ e' K
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-: F! F+ Z3 q- ]
competition drug test is already in effect, which Callaway failed to mention) j! t( ?& K5 |4 K
. As noted in the president of WADA’s press release, drug testing for K+ W4 h, s+ h
Olympians began at least six months before the opening of the London6 T- K9 Z1 N/ m) e4 ~ D( S. Z
Olympics. Furthermore, 107 athletes have been banned from this Olympics for1 {0 |6 T) O5 `- A, m
doping. That may be the reason that “everyone will pass at the Olympic
6 I3 C: G8 e, \( K# A! bgames. Hardly anyone fails in competition testing” — those who did dope1 a2 x2 K# S9 V) i
have already been caught and sanctioned. Callaway is free to suggest that a
9 s0 x. [$ L! {player could have doped beforehand and fooled the test at the game, but this# p+ B' \% m3 [: W
possibility is certainly ruled out for Ye.
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Over all, even though Callaway did not falsify any data, he did (
& z0 Z8 G$ ^4 F3 eintentionally or not) cherry-pick data that, in my view, are far too6 [; a/ a0 A+ R0 n3 w n7 a
suggestive to be fair and unbiased. If you want to cover a story of a
- o# L$ ^8 y- }# q& M$ U* u% Gsuspected doping from a scientific point of view, be impartial and provide
2 z1 e% w. Q$ z4 u: lall the facts for the reader to judge. You are entitled to your# \ }# O4 i- Q. r6 Q" }4 F; G
interpretation of the facts, and the expression thereof in your piece,
8 W8 v. |. q' u4 G3 C# Iexplicitly or otherwise, but showing only evidence that favours your9 ?) ?1 _. q3 ~5 j
argument is hardly good science or journalism. Such an article in a journal' e9 i/ w6 r3 R' N6 e4 F
such as Nature is not an appropriate example of how scientific research or
! z" g+ p* o0 ?( Areporting should be done. |
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