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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
$ g8 d6 T( p. [/ b. O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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+ u3 U$ z1 i+ K# N: G7 d1 xhttp://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" q! x, G' Y7 R; }1 W
, regard as one of the most prestigious and influential physical-science
, l0 G' M2 d' |) ]* N4 U! _magazines — publish a thinly veiled biased article like this. Granted, this
2 ^9 @: g- _3 Y7 T7 |! l3 g3 p- d$ _is not a peer-reviewed scientific article and did not go through the8 _9 c& ]) b: h8 U( o( `
scrutiny of picking referees. But to serve as a channel for the general: r; O+ P' |( L3 K7 ~, C0 o+ N; Z
populace to be in touch with and appreciate science, the authors and editors v% \6 M F7 `& X( X
should at least present the readers with facts within the proper context,- c+ {! y; U+ O" \; t. E. V0 Z0 l0 K4 @4 [
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
$ A3 ]8 X5 G$ t- R1 }% J) @Olympic 400-metre IM time with her performance at the World Championships in
9 D8 T3 M7 z Q+ L& {! L2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “. e. a$ R( z$ N1 j" d4 X
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
8 ~7 R7 `* ~- @* S: z7 epersonal best was 4:33.79 at the Asian Games in 2010. This leads to an* L$ V( `7 I% a" D/ E4 t
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the* m3 @* ]& M O( s- u* H
difference between the gold and silver medal, I see no reason for 5.38 s to. s' y$ X: m( _( E* k+ k( X
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is$ t5 W% N, Y; U7 Y! k" y7 S( m
still developing. Bettering oneself by 5 seconds over two years may seem1 d' f. {2 B% G; g% z% \' B* c
impossible for an adult swimmer, but it certainly happens among youngsters.
H7 w6 E: m( L( ^An interview with Australian gold medallist Ian Thorpe revealed that his 400& }0 ]0 |* J, C
-metre freestyle time improved by 5 seconds between the ages of 15 and 16., R: p' P5 \0 l# @2 Z( g
For regular people, including Callaway, it may be hard to imagine what an" x$ Y X$ T3 r
elite swimmer can achieve as he or she matures and undergoes scientific and2 f. G! M" }, T1 r% m6 Y: C
persistent training. But jumping to the conclusion that it is “anomalous”1 h/ b- ~" x. E J( Q: w) H( l" f
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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3 d' [" `' L; X: B. [Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook5 y9 F4 Z, h4 M" |' n4 K, b
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
; y7 Z+ x7 l2 g7 g, u* pthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so$ A. R3 a- [0 C
he chose not to push himself too hard and to conserve his energy for later- c* |. k* }7 b5 Z5 }- e
events (whether this conforms to the Olympic spirit and the ‘use one’s" z2 h* F0 R$ a$ K7 O
best efforts to win a match’ requirement that the Badminton World
& Q" ]+ ~" L) J! ~+ QFederation recently invoked to disqualify four badminton pairs is another
1 {$ j2 U. H5 P9 k! P- p/ atopic worth discussing, though probably not in Nature). Ye, on the other7 B) d1 t1 ~) t
hand, was trailing behind after the first 300 metres and relied on freestyle
# w& X( m% u8 S; V7 \" W2 [( h, in which she has an edge, to win the race. Failing to mention this
) O' i8 ?1 _2 f K) N5 _3 [strategic difference, as well as the fact that Lochte is 23.25 seconds0 `4 Q# S% ^: u. z: n2 q
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
3 S. \3 r$ E' L6 t; ^% K( h1 k. pfaster than the best man in the same sport, which sounds impossible. Putting: r0 i& x, Q6 c$ r3 y+ k
aside the gender argument, I believe this is still a leading question that2 u# Z) q* `- [, ~0 Z1 i/ ~& K
implies to the reader that there is something fishy going on.
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* `8 X. `4 d7 r& a/ RFourth is another example of cherry-picking. In the same event, there are8 u( @& |& |* n5 E; v |9 g
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93; N1 ^9 H# S: p- ?
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
) w' h1 q8 ]- g/ i# D), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns- a. g/ c+ S8 l' b& Y; B8 i9 h9 M
out, if we are just talking about the last 50 metres in a 400-metre IM,7 W; ]% v& {3 J8 b
Lochter is not the example I would have used if I were the author. What kind0 a' V" y) I" |1 w
of scientific rigorousness is Callaway trying to demonstrate here? Is it
$ m7 L2 f* M9 J8 k, ]1 elogical that if Lochter is the champion, we should assume that he leads in
; ]4 d9 w2 y4 m# w+ N" D: mevery split? That would be a terrible way to teach the public how science6 O; `3 d& m# d
works.
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" b, h: }0 c* H+ v; bFifth is the issue I oppose the most. Callaway quotes Ross Tucker and" w: c9 d; Q0 Q- I5 y3 m
implies that a drug test cannot rule out the possibility of doping. Is this/ ]$ O* S$ Z( B0 Y7 v, [
kind of agnosticism what Nature really wants to teach its readers? By that6 Y0 F' l2 H7 u0 [. a2 l
standard, I estimate that at least half of the peer-reviewed scientific
; e+ F4 |( |/ o* ~* i0 o2 e9 zpapers in Nature should be retracted. How can one convince the editors and
/ k- L9 }( ]( }# Vreviewers that their proposed theory works for every possible case? One) R2 k4 V2 L1 O/ C
cannot. One chooses to apply the theory to typical examples and to* @# F, N$ I- Y* O u
demonstrate that in (hopefully) all scenarios considered, the theory works5 A" r k( |1 ]1 g: O: Z
to a degree, and that that should warrant publication until a counterexample
, |6 B9 e9 `" |3 U4 B: wis found. I could imagine that Callaway has a sceptical mind, which is) t; {4 k/ Y+ M, G2 A2 r5 y- U* W
crucial to scientific thinking, but that would be put to better use if he
* r7 l9 @0 {% |, bwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
+ ~+ | M8 B1 V( m2 F0 hadvanced, non-detectable drug that the Chinese have come up with in the
& W% _0 j) m3 |7 xpast 4 years (they obviously did not have it in Beijing, otherwise why not
- S5 o& r2 i5 f9 t, Iuse it and woo the audience at home?), based on data and rational derivation$ Z1 C0 V- f3 G6 B* t# m
. This article, however, can be interpreted as saying that all athletes are' K$ d" F5 p1 |6 e: v/ b; e3 f7 _
doping and the authorities are just not good enough to catch them. That may
9 h5 v; u) ^& l9 F4 s% Nbe true, logically, but definitely will not make the case if there is ever a5 T3 R5 s d, F' @& |6 V
hearing by the governing body for water sports, FINA, to determine if Ye0 T C4 h# B, Q9 h
has doped. To ask whether it is possible to obtain a false negative in a9 k1 B& M9 ?. z( r
drug test looks like a rigged question to me. Of course it is possible:. \) }6 B3 I+ i4 a' ` B/ f
other than the athlete taking a drug that the test is not designed to detect
2 `8 {! k! ?& j3 i; D$ C- _, anyone who has taken quantum 101 will tell you that everything is
! |0 q% c9 q& I; m4 F* |' U2 O/ sprobabilistic in nature, and so there is a probability that the drug in an% i8 I4 l- q" \% Y9 l% H5 s; d
athlete’s system could tunnel out right at the moment of the test. A slight
: g& u" E; V1 q# Nchance it may be, but should we disregard all test results because of it?- L G J+ u) G: R* G
Let’s be practical and reasonable, and accept that the World Anti-Doping
( O% l7 `6 \+ v6 @# uagency (WADA) is competent at its job. Ye’s urine sample will be stored for" h/ D' r' m4 |1 W1 v% M6 T
eight years after the contest for future testing as technology advances.
% x t: B- y) b2 VInnocent until proven guilty, shouldn’t it be?! I! v+ g9 y- O& g& K- b4 R
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Sixth, and the last point I would like to make, is that the out-of-5 p! d* F/ O5 b2 q) J8 v* s/ e
competition drug test is already in effect, which Callaway failed to mention/ e) n* c; {% `9 ?0 v1 [
. As noted in the president of WADA’s press release, drug testing for: W7 v6 m% l+ B; |7 c/ [
Olympians began at least six months before the opening of the London Z6 A; a, B* Q6 @' D
Olympics. Furthermore, 107 athletes have been banned from this Olympics for1 s. Y. _, C/ v) ?& t
doping. That may be the reason that “everyone will pass at the Olympic2 H" a$ j" [; c7 B5 ^* y
games. Hardly anyone fails in competition testing” — those who did dope' E' q$ M3 i; p& Q, U9 |
have already been caught and sanctioned. Callaway is free to suggest that a0 V. D! C' ?9 k( P# m
player could have doped beforehand and fooled the test at the game, but this& V# ]% L+ p- S& x* f4 k# C
possibility is certainly ruled out for Ye.
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, p7 i0 a- L% G( ~Over all, even though Callaway did not falsify any data, he did (+ N' F' c# ]6 U1 v( P
intentionally or not) cherry-pick data that, in my view, are far too
5 Q x' L* m! S# Y/ xsuggestive to be fair and unbiased. If you want to cover a story of a
/ l# ]% S7 H- w" I; K" ususpected doping from a scientific point of view, be impartial and provide
3 L% y; P; h+ }1 s fall the facts for the reader to judge. You are entitled to your
; p M* [2 V' Y0 v+ d* p J+ R# Qinterpretation of the facts, and the expression thereof in your piece,
% O& K# V8 e7 E+ @5 V9 n, q, _explicitly or otherwise, but showing only evidence that favours your$ N" Z$ h/ y k1 }- \- a
argument is hardly good science or journalism. Such an article in a journal2 f6 k `9 a" C- f5 V3 b% `* w/ q
such as Nature is not an appropriate example of how scientific research or
: V. f7 W4 z/ l* ~) treporting should be done. |
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