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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, V; I+ Q0 c. ~9 I$ s& q
如果是中国长大的,英语能到这种程度真是很不简单。. R0 \* y. ^2 ]$ S& G/ {
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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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" g% B' I" F9 V* F8 tFROM LAI JIANG, Department of Chemistry, University of Pennsylvania
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1 E) `5 E! m) |' C6 |0 uIt is a shame to see Nature — which nearly all scientists, including myself9 m' I6 Z; H1 k' @$ r1 @* O
, regard as one of the most prestigious and influential physical-science6 P3 Y+ s+ h+ q% c; c; [
magazines — publish a thinly veiled biased article like this. Granted, this: O( q/ d5 [% j* j9 x9 o2 f
is not a peer-reviewed scientific article and did not go through the
$ K7 t8 s. _! {, N7 Iscrutiny of picking referees. But to serve as a channel for the general9 a% T0 o4 L' u# C0 u7 h, H
populace to be in touch with and appreciate science, the authors and editors2 `1 x0 c j% @' y
should at least present the readers with facts within the proper context,
# L! |0 q; g8 c$ {which they blatantly failed to do.
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; h& l; l' A9 `# h; G5 \- _- @ fFirst, to identify Ye’s performance increase, Ewen Callaway compared her
% b6 v4 |& P0 _8 MOlympic 400-metre IM time with her performance at the World Championships in
# g; I" i; E: w1 V: Z# ?& J2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
4 j& W* M% q6 V2 uanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
2 _, r2 N3 j! B [personal best was 4:33.79 at the Asian Games in 2010. This leads to an8 L6 e1 ], `" C
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
; t* g2 R1 w1 b5 |, ^. jdifference between the gold and silver medal, I see no reason for 5.38 s to% }* L0 Y$ E. F- f, F- U' F- v
be treated as 7 s." Z3 o; ]3 s4 ?( {3 I6 W$ B3 l
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Second, as previously pointed out, Ye is only 16 years old and her body is
' \9 _. b/ F5 d5 C$ x+ nstill developing. Bettering oneself by 5 seconds over two years may seem4 U' m# x1 U, e/ l
impossible for an adult swimmer, but it certainly happens among youngsters.
0 G- Y* @0 ~4 G7 ZAn interview with Australian gold medallist Ian Thorpe revealed that his 400" ~" ~- C, r& H) h/ G3 s
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
! p- f* z7 O# G1 NFor regular people, including Callaway, it may be hard to imagine what an
5 i7 c. Y' M1 c' m1 f# g+ ielite swimmer can achieve as he or she matures and undergoes scientific and
0 _% \# j; Y8 w& V; Bpersistent training. But jumping to the conclusion that it is “anomalous”
3 u W8 `9 A1 v6 Tbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.& q. Q0 c" ^2 H4 `' c
! O; k$ z" Y/ t) o- O3 IThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
9 L; \, s) S# X% {6 D9 f1 Gexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in* o* m; B* n# s. r& B
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
/ k. i7 x( Z; u( o; A! Che chose not to push himself too hard and to conserve his energy for later3 a' L' `6 s, s/ z! S8 Z
events (whether this conforms to the Olympic spirit and the ‘use one’s
( H R( q w+ J% y9 H% vbest efforts to win a match’ requirement that the Badminton World1 I1 ], P0 M, B# R: ?; s
Federation recently invoked to disqualify four badminton pairs is another
3 g6 K3 y* d$ gtopic worth discussing, though probably not in Nature). Ye, on the other
" ?( r; X6 i- ^1 w& \" b/ z/ Ehand, was trailing behind after the first 300 metres and relied on freestyle$ a- y& l/ V7 j$ Z
, in which she has an edge, to win the race. Failing to mention this
0 M' Y% E& O$ }/ k# h2 wstrategic difference, as well as the fact that Lochte is 23.25 seconds0 f/ @6 j+ w% q; Y w# d. M5 }- n
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
1 R. X2 h! b) V U5 kfaster than the best man in the same sport, which sounds impossible. Putting1 }4 o B+ e+ O: t; z
aside the gender argument, I believe this is still a leading question that
( M4 `5 L1 S8 mimplies to the reader that there is something fishy going on.: \# t. n; M; m* @& c( W
) Y. }! e9 B; f% B! H. i' Y0 nFourth is another example of cherry-picking. In the same event, there are0 ~) h3 }' S. c6 E' z- D
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93# A7 _; n5 ]4 L
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s, ]3 s. i& O% r7 U+ l) W
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns" m. p4 w' h& o N
out, if we are just talking about the last 50 metres in a 400-metre IM,
+ Z' \2 z+ B1 m' M' n$ }& p2 P) ULochter is not the example I would have used if I were the author. What kind) M1 l. `3 K5 h
of scientific rigorousness is Callaway trying to demonstrate here? Is it S7 o, @- ~) M* V" R
logical that if Lochter is the champion, we should assume that he leads in
: U4 N/ n* l/ h4 P t U' p/ Uevery split? That would be a terrible way to teach the public how science
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and
0 N$ H$ A. ?/ Z% mimplies that a drug test cannot rule out the possibility of doping. Is this
& V; }$ [" I$ M7 O+ f, ?9 Vkind of agnosticism what Nature really wants to teach its readers? By that
: N3 W6 ~/ u# b& k! Xstandard, I estimate that at least half of the peer-reviewed scientific# { H" A- T6 E0 e f R$ g
papers in Nature should be retracted. How can one convince the editors and P p# T/ d% G0 i, ~
reviewers that their proposed theory works for every possible case? One
2 _" d! z' y4 d- y$ e- p* vcannot. One chooses to apply the theory to typical examples and to
' Q8 j+ _2 O. C7 I9 Wdemonstrate that in (hopefully) all scenarios considered, the theory works
" C, ~9 u4 J$ |' Rto a degree, and that that should warrant publication until a counterexample- G% G' F5 p* q0 k8 Q% u
is found. I could imagine that Callaway has a sceptical mind, which is9 z" ^% h" l& ^. [0 G) |/ Q! n& r
crucial to scientific thinking, but that would be put to better use if he
' L; i) K5 B, M% m' Jwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly( S1 z! ^ {" Q; n5 \* @* r
advanced, non-detectable drug that the Chinese have come up with in the, r2 t0 j8 y# D) Z* Z
past 4 years (they obviously did not have it in Beijing, otherwise why not `' E7 k% r4 J( J5 [& ~
use it and woo the audience at home?), based on data and rational derivation2 [( }7 ]( W- v
. This article, however, can be interpreted as saying that all athletes are" i+ |0 [3 h2 t/ {) h
doping and the authorities are just not good enough to catch them. That may
% y/ F0 s$ z$ i; ~8 n3 ~ t. f) _) d% Dbe true, logically, but definitely will not make the case if there is ever a
4 |$ ~8 p* i( n' A8 A" i+ Xhearing by the governing body for water sports, FINA, to determine if Ye; D7 {" g: p2 u P: y7 K; l
has doped. To ask whether it is possible to obtain a false negative in a
! J6 Z! V1 f2 _ L% \drug test looks like a rigged question to me. Of course it is possible:
! R: H$ p* ]2 n2 Y4 i7 `2 b, ]other than the athlete taking a drug that the test is not designed to detect6 M, k+ a; O5 @3 }
, anyone who has taken quantum 101 will tell you that everything is
5 h N: `' J; |" S* Z2 Zprobabilistic in nature, and so there is a probability that the drug in an: t& l. ~# I, @( g3 _! _1 s8 J. J
athlete’s system could tunnel out right at the moment of the test. A slight: C' F8 [6 G: v0 E" O# n
chance it may be, but should we disregard all test results because of it?( c# @5 n- e0 {3 c5 V E
Let’s be practical and reasonable, and accept that the World Anti-Doping- |6 |, S3 j/ H
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
, ~- ^+ u/ n/ H/ r: f9 Qeight years after the contest for future testing as technology advances.
4 U( Q& ?$ S) x6 u4 u1 IInnocent until proven guilty, shouldn’t it be?: B" \- w" h6 [9 O$ `
' U# U5 I9 x3 x$ \& {* Y4 fSixth, and the last point I would like to make, is that the out-of-
) R% i- p4 }$ v$ {$ I1 E* rcompetition drug test is already in effect, which Callaway failed to mention
# K* P7 Z6 O& w( k( D& l" I) L6 Y. As noted in the president of WADA’s press release, drug testing for
8 `$ |. o5 k2 @$ h/ M2 t# B- H7 gOlympians began at least six months before the opening of the London) e C" W5 f+ z' E" z2 w, L1 I
Olympics. Furthermore, 107 athletes have been banned from this Olympics for. [' x0 i. |+ u3 I. ]9 C" y
doping. That may be the reason that “everyone will pass at the Olympic
1 h- Y4 X9 j1 A+ l1 t hgames. Hardly anyone fails in competition testing” — those who did dope* D$ J$ L+ t7 s( n. Z% R
have already been caught and sanctioned. Callaway is free to suggest that a+ _- ~8 i7 G+ K z9 J
player could have doped beforehand and fooled the test at the game, but this) e4 Q" z- e6 L$ i
possibility is certainly ruled out for Ye.0 c1 `6 c0 [ k3 j( O4 }
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Over all, even though Callaway did not falsify any data, he did (/ v6 z- n9 e) M9 ]) q" ~' f; S9 q
intentionally or not) cherry-pick data that, in my view, are far too
) L* C1 P/ ~9 D. usuggestive to be fair and unbiased. If you want to cover a story of a1 r% E) w; J* N3 M# m k- Y j
suspected doping from a scientific point of view, be impartial and provide
& a/ t: `$ D$ w$ O Wall the facts for the reader to judge. You are entitled to your
4 g+ A$ y, o, d$ F. dinterpretation of the facts, and the expression thereof in your piece,
0 s2 f$ |, @$ G: U/ O3 L3 d% |6 M$ Eexplicitly or otherwise, but showing only evidence that favours your" U) f+ R+ M' L- h
argument is hardly good science or journalism. Such an article in a journal
5 R& R0 @7 I/ m' U+ Xsuch as Nature is not an appropriate example of how scientific research or
' V! P9 _1 e, L4 q, D6 Yreporting should be done. |
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