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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# z4 ^* U; {% 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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/ }% o; v1 F/ r( v& p, J$ |http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania* C, {" I) f" _: u0 l5 @
0 P9 L$ I9 i4 T5 t3 O# Y3 D. CIt is a shame to see Nature — which nearly all scientists, including myself; c3 P @ ~( r3 T
, regard as one of the most prestigious and influential physical-science
+ U1 U& x' i7 smagazines — publish a thinly veiled biased article like this. Granted, this
' o B7 P- s9 G9 ~6 ?9 ~is not a peer-reviewed scientific article and did not go through the
3 Z; D! D- Q) T7 Z0 bscrutiny of picking referees. But to serve as a channel for the general
0 R# J; q6 u/ Xpopulace to be in touch with and appreciate science, the authors and editors, b* }7 g r9 ~
should at least present the readers with facts within the proper context,5 w- v' |0 ]% w; b
which they blatantly failed to do.1 R! M) O( T" l5 z. G* x
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First, to identify Ye’s performance increase, Ewen Callaway compared her
4 q* @& s( J- z4 xOlympic 400-metre IM time with her performance at the World Championships in1 Q9 N# v1 f# E: ]" S8 K+ R
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “' L. a/ n. Z3 [/ q+ `
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous3 B6 J1 J) U" C. d) J
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
" v: u5 Q+ Q& g$ s) Z, Timprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
, T% u2 Y7 \4 c+ I1 pdifference between the gold and silver medal, I see no reason for 5.38 s to" C' {* T: ~% Z
be treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is
8 ]6 ?8 T. t% Dstill developing. Bettering oneself by 5 seconds over two years may seem& e$ L5 w+ |- S
impossible for an adult swimmer, but it certainly happens among youngsters.
$ [9 T7 ?9 @/ JAn interview with Australian gold medallist Ian Thorpe revealed that his 400" u, N8 ^, ^& ]9 u
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
4 H7 n- G7 K% t- uFor regular people, including Callaway, it may be hard to imagine what an. }4 g, P9 A' p( ]6 Y
elite swimmer can achieve as he or she matures and undergoes scientific and+ X+ ?: \4 p% G; A' E9 c
persistent training. But jumping to the conclusion that it is “anomalous”
7 q0 |* _! \8 p6 abased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.. g7 p/ L) o! O8 z; p3 l- p& u. `
0 n( G7 r1 ]" L# {Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
( g: b" L0 O, O* gexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
1 c+ ?: H) ?) e/ r9 o5 Xthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so' Q, l! e( u- g9 z0 C3 @) F
he chose not to push himself too hard and to conserve his energy for later
3 X5 z. n. Q+ }8 J. Q. v8 ?events (whether this conforms to the Olympic spirit and the ‘use one’s
6 v- A7 ~2 e! ]$ U3 ]9 }) Qbest efforts to win a match’ requirement that the Badminton World
$ z* d: |2 [; n! CFederation recently invoked to disqualify four badminton pairs is another
! X/ J- t: ?# R, N' g6 g" Btopic worth discussing, though probably not in Nature). Ye, on the other; \! @- W" D- D4 }, ]) K0 A
hand, was trailing behind after the first 300 metres and relied on freestyle' @. I% O- ^" Q9 V% o
, in which she has an edge, to win the race. Failing to mention this
# h' U( |( |' \& @' ]! O4 hstrategic difference, as well as the fact that Lochte is 23.25 seconds
6 V! f% E9 t7 v9 N1 d; S4 f1 p& @faster (4:05.18) than Ye overall, creates the illusion that a woman swam- }8 ~! q% }) v% b2 r1 \# R2 A
faster than the best man in the same sport, which sounds impossible. Putting
7 ?" a3 E0 v& v* U4 A6 Q5 L. Kaside the gender argument, I believe this is still a leading question that( Z c3 a; [5 R6 k R8 x1 q- {
implies to the reader that there is something fishy going on.
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1 D8 a% v- W( tFourth is another example of cherry-picking. In the same event, there are# S1 m2 ]6 U; N6 _8 u
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93+ @- I+ e! E: Z* _/ y
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s! d; o) y. E0 M$ k2 p2 M
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
% E4 X: B! r; s) F3 x; h$ M. Yout, if we are just talking about the last 50 metres in a 400-metre IM,. Y! Z% g7 f2 n( X4 n* v
Lochter is not the example I would have used if I were the author. What kind: ^% N( H/ P7 J* n1 Y* B
of scientific rigorousness is Callaway trying to demonstrate here? Is it# Z# ]! z5 P: W7 ^0 T$ e
logical that if Lochter is the champion, we should assume that he leads in4 T, K9 F3 s9 O
every split? That would be a terrible way to teach the public how science
) i$ t) h0 X: {( sworks.1 i( Q: m+ k/ n1 @: c( e1 {
; \& x: Y' q/ I3 b7 r' x8 j1 ]$ mFifth is the issue I oppose the most. Callaway quotes Ross Tucker and5 f8 y; z ?' T# \/ A) i& v
implies that a drug test cannot rule out the possibility of doping. Is this
& e* r4 x! C3 D5 A$ Ekind of agnosticism what Nature really wants to teach its readers? By that3 Q) v! B' t( ?8 [
standard, I estimate that at least half of the peer-reviewed scientific
8 a/ H+ D* e$ F: K$ Bpapers in Nature should be retracted. How can one convince the editors and
5 W. `0 g1 M5 M& Jreviewers that their proposed theory works for every possible case? One7 {; E5 s! w: V( q) _
cannot. One chooses to apply the theory to typical examples and to4 N |2 F8 j8 J% X3 B6 |6 u
demonstrate that in (hopefully) all scenarios considered, the theory works; }5 ~* w- X7 k
to a degree, and that that should warrant publication until a counterexample
+ R4 s! M: f& O* M+ @6 r: _/ Yis found. I could imagine that Callaway has a sceptical mind, which is
, \/ Z: U2 L# q1 y1 U7 @crucial to scientific thinking, but that would be put to better use if he6 f5 W8 Y& F2 h) J6 p/ j
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly) `' P* m0 Z' k* I2 c
advanced, non-detectable drug that the Chinese have come up with in the
7 K2 E4 M' i+ C& E/ i' y; v* ]' A' @past 4 years (they obviously did not have it in Beijing, otherwise why not
( S4 ?; Q9 N, D+ M5 Guse it and woo the audience at home?), based on data and rational derivation, p! b; c2 _' u8 [
. This article, however, can be interpreted as saying that all athletes are
9 ]9 h; d s- B2 Y' ndoping and the authorities are just not good enough to catch them. That may
- _1 I3 X! a# [) j. P, g7 ?be true, logically, but definitely will not make the case if there is ever a
- n& X2 Q! q: h- lhearing by the governing body for water sports, FINA, to determine if Ye
3 s0 N( N H9 L, P W' W8 v) ?& mhas doped. To ask whether it is possible to obtain a false negative in a1 v# E# y5 h# Z+ `; j" c
drug test looks like a rigged question to me. Of course it is possible:
1 Y/ p6 `( O; `1 Bother than the athlete taking a drug that the test is not designed to detect
! k; g- S0 D9 l, anyone who has taken quantum 101 will tell you that everything is
, {8 U' q9 O! w+ ]6 fprobabilistic in nature, and so there is a probability that the drug in an* L2 u; B/ ]- _( T: O1 w
athlete’s system could tunnel out right at the moment of the test. A slight
7 i( x. p, O1 K( \chance it may be, but should we disregard all test results because of it?4 z+ j X6 D9 ?. f* H0 A8 x+ y+ C
Let’s be practical and reasonable, and accept that the World Anti-Doping6 x; s" P5 [+ b$ |
agency (WADA) is competent at its job. Ye’s urine sample will be stored for
- I& m6 M9 n! `" {eight years after the contest for future testing as technology advances.
! B4 I& X! B6 f% _* cInnocent 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-
$ R% b X. \1 l- \ ycompetition drug test is already in effect, which Callaway failed to mention
' M2 f" Y9 @2 [7 \2 N, t$ K. As noted in the president of WADA’s press release, drug testing for, }2 J& {) r$ t4 A, ^6 u+ Z6 ^4 w- q
Olympians began at least six months before the opening of the London. T4 j3 r$ H) O# q7 C& A
Olympics. Furthermore, 107 athletes have been banned from this Olympics for9 r* h/ P \* q( X8 Y3 d
doping. That may be the reason that “everyone will pass at the Olympic# y# h: x5 i' Q
games. Hardly anyone fails in competition testing” — those who did dope5 V2 H; H8 w7 h
have already been caught and sanctioned. Callaway is free to suggest that a
) V6 X/ @; b& \8 ?player could have doped beforehand and fooled the test at the game, but this
. l" l8 U6 y- W" A) X8 Epossibility is certainly ruled out for Ye.; z4 F0 V7 w4 Q
% l2 w" E/ K1 `Over all, even though Callaway did not falsify any data, he did (
, H7 F0 V$ I1 B" W/ ~3 X9 v( f* S# dintentionally or not) cherry-pick data that, in my view, are far too7 ?+ i( Q% |& g' j9 n
suggestive to be fair and unbiased. If you want to cover a story of a; o+ R. Q1 ~. k# A7 _
suspected doping from a scientific point of view, be impartial and provide j3 E3 a6 n* w
all the facts for the reader to judge. You are entitled to your4 Q/ h" a( O$ K, I
interpretation of the facts, and the expression thereof in your piece,+ l7 K) c" K3 |+ U0 c7 |
explicitly or otherwise, but showing only evidence that favours your
; I$ {6 T3 F3 {9 u dargument is hardly good science or journalism. Such an article in a journal- I! i$ u( m3 q0 M Y4 p& \
such as Nature is not an appropriate example of how scientific research or
6 B! K; R# G0 U. `( A$ dreporting should be done. |
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