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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
c( d" F9 p* B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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http://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 myself3 `( ?* ~6 S; @
, regard as one of the most prestigious and influential physical-science
- v0 e/ ]& z8 {9 ]2 H3 m6 R+ Gmagazines — publish a thinly veiled biased article like this. Granted, this5 y2 e& d4 y; ^8 h
is not a peer-reviewed scientific article and did not go through the
) A4 L8 O5 O" _6 c8 q* D: G+ Uscrutiny of picking referees. But to serve as a channel for the general
7 P& y' F" a# d: Q2 ^populace to be in touch with and appreciate science, the authors and editors
. [1 b1 q9 p; qshould at least present the readers with facts within the proper context,, y+ X2 A& e7 T* Y$ ^7 X6 @
which they blatantly failed to do.
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. K: G( [5 y t2 ZFirst, to identify Ye’s performance increase, Ewen Callaway compared her
+ [) T' K* {( A$ _' \# K7 |Olympic 400-metre IM time with her performance at the World Championships in
8 Q/ O$ Y0 _- \* S) [2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
% v+ S( c5 p. L# A3 S( k! I" F: Aanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
3 {4 q; l( c9 v: cpersonal best was 4:33.79 at the Asian Games in 2010. This leads to an& X: p# O" q6 u- G, N' ^, n& N3 R
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
' U" d" s9 W( f6 O; Qdifference between the gold and silver medal, I see no reason for 5.38 s to. u- J+ H: ~5 j2 F) P$ c5 D. e
be treated as 7 s. t9 [# |1 \ h/ m# S
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Second, as previously pointed out, Ye is only 16 years old and her body is- \$ |' S5 S0 Z8 D4 R/ F/ w* @0 M9 `
still developing. Bettering oneself by 5 seconds over two years may seem2 s Q1 h; B$ j
impossible for an adult swimmer, but it certainly happens among youngsters.
1 U6 |/ _; m( L# X! n5 a+ {$ K) ^An interview with Australian gold medallist Ian Thorpe revealed that his 4004 g* q$ u3 N% q4 [9 u7 P$ N' q
-metre freestyle time improved by 5 seconds between the ages of 15 and 16." x5 N& D, p8 k4 K6 U+ B* T( |
For regular people, including Callaway, it may be hard to imagine what an0 V% h, ]9 | h" P
elite swimmer can achieve as he or she matures and undergoes scientific and
2 H% R: A* u7 z9 ]5 E& _persistent training. But jumping to the conclusion that it is “anomalous”2 U7 V8 K! T+ F2 T. S( R
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.+ z; _9 w8 m4 P4 C& h
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook: H7 f7 z: `* C* M' h; X
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in( |5 Q$ j& Y% q3 ^
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
5 h' _3 }4 A H0 T) k J6 {: fhe chose not to push himself too hard and to conserve his energy for later
/ q* U5 N" [1 U3 Eevents (whether this conforms to the Olympic spirit and the ‘use one’s
$ H+ w; y1 c5 j) j8 F0 lbest efforts to win a match’ requirement that the Badminton World, c$ l0 j; |/ Z8 s1 L$ i
Federation recently invoked to disqualify four badminton pairs is another
" z5 _' g3 R- T7 V' Ctopic worth discussing, though probably not in Nature). Ye, on the other8 D0 K& z6 O, T3 ]! D' F# F Y
hand, was trailing behind after the first 300 metres and relied on freestyle. D6 z! W( s/ ]2 Q9 I3 q! z& ~7 T, t
, in which she has an edge, to win the race. Failing to mention this u& |$ e& m( d' y8 d" [; X
strategic difference, as well as the fact that Lochte is 23.25 seconds5 C' o8 s1 Q& Y! j' K1 B/ D
faster (4:05.18) than Ye overall, creates the illusion that a woman swam
3 \8 _2 F c: C2 v9 }faster than the best man in the same sport, which sounds impossible. Putting" W. V& @+ w9 y w
aside the gender argument, I believe this is still a leading question that
5 v8 }+ T% k: e/ ?2 A6 Nimplies to the reader that there is something fishy going on.6 _8 c& g$ q* d) x6 {
) O- U+ Z, Z; [Fourth is another example of cherry-picking. In the same event, there are
( H4 l; A, L3 l" W. sfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
% }0 R$ t s& ^% ks) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
" I* T8 |' V4 v: M+ E), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns& w- G3 c' m( E& j9 E! Z( ?
out, if we are just talking about the last 50 metres in a 400-metre IM,% J8 x% E/ F6 A: y6 C- U+ v. n9 l
Lochter is not the example I would have used if I were the author. What kind
" U( v7 h% g1 p# ?7 s7 r4 \of scientific rigorousness is Callaway trying to demonstrate here? Is it6 k" F i$ H- s0 V0 a% {
logical that if Lochter is the champion, we should assume that he leads in
% B3 A" K/ ]) X7 M' r* Q* u+ severy split? That would be a terrible way to teach the public how science
& c) B T0 l/ T2 Nworks.. c+ k. a* u' i8 c* V+ L) G! |5 b! n
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and7 ~9 f0 B: u7 L
implies that a drug test cannot rule out the possibility of doping. Is this
) L8 Z {1 a# M3 [% Lkind of agnosticism what Nature really wants to teach its readers? By that. T! N4 q) T7 w$ H
standard, I estimate that at least half of the peer-reviewed scientific
$ a. b; e ?; R. V2 Hpapers in Nature should be retracted. How can one convince the editors and) r' g, X) y" u' l( W, X
reviewers that their proposed theory works for every possible case? One
1 K+ C) p9 x( Vcannot. One chooses to apply the theory to typical examples and to
" T4 e, y2 C4 z5 s4 v5 jdemonstrate that in (hopefully) all scenarios considered, the theory works: s6 p# d6 Q6 v6 b. |4 j
to a degree, and that that should warrant publication until a counterexample
& G) Q$ s# b& Yis found. I could imagine that Callaway has a sceptical mind, which is. c4 V0 i9 u4 n: Q3 T2 q" \
crucial to scientific thinking, but that would be put to better use if he( Z" T# S$ F+ k. ]" V
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
0 n' ^* L2 q, G2 H1 F/ \3 T1 dadvanced, non-detectable drug that the Chinese have come up with in the
( H4 Q }0 b8 m7 L, b& h, g* C- ppast 4 years (they obviously did not have it in Beijing, otherwise why not
9 H7 Q. Z2 i3 ^" ]5 ause it and woo the audience at home?), based on data and rational derivation
) D! S: s2 o0 m, U$ b. This article, however, can be interpreted as saying that all athletes are
5 e' t) ^8 t- @ Odoping and the authorities are just not good enough to catch them. That may
. l, V0 K: u9 zbe true, logically, but definitely will not make the case if there is ever a
/ L9 B6 G |) T+ e* }8 whearing by the governing body for water sports, FINA, to determine if Ye; E% I4 i4 M3 H8 O
has doped. To ask whether it is possible to obtain a false negative in a8 T t5 E+ z- I
drug test looks like a rigged question to me. Of course it is possible:/ s( b" F, @2 }9 u+ t4 F: Y
other than the athlete taking a drug that the test is not designed to detect7 J+ B' x2 g& o8 ~& h
, anyone who has taken quantum 101 will tell you that everything is
* P7 _. H7 k" T! E5 V2 Uprobabilistic in nature, and so there is a probability that the drug in an
S' ^2 g F+ Z: F! m9 |+ A* _1 ^athlete’s system could tunnel out right at the moment of the test. A slight
! N0 d, X- |- V5 J" mchance it may be, but should we disregard all test results because of it?: V I' ~8 c/ H" p S x$ Y8 c
Let’s be practical and reasonable, and accept that the World Anti-Doping
2 e: G W8 v- v/ `7 E u& vagency (WADA) is competent at its job. Ye’s urine sample will be stored for
5 Y& f" s5 C* Z3 Z! ?5 R6 xeight years after the contest for future testing as technology advances." b+ m/ X' C" J" x" a. O8 E
Innocent until proven guilty, shouldn’t it be?. W% r" Y, q7 {5 q( O2 ]3 }
u; Z5 d0 t! L6 d# h. H. LSixth, and the last point I would like to make, is that the out-of-. d X* ]/ G7 U/ z
competition drug test is already in effect, which Callaway failed to mention' u" X; N* |0 i
. As noted in the president of WADA’s press release, drug testing for) g: a. h6 d" S; O; W; G
Olympians began at least six months before the opening of the London c6 [& ^9 A7 [1 b
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
, K% ~7 l' p3 e' Ldoping. That may be the reason that “everyone will pass at the Olympic
3 m8 s" {* d6 I) Y2 [7 w+ w: Ogames. Hardly anyone fails in competition testing” — those who did dope6 l' H$ E' B0 i) q! ]; e# F
have already been caught and sanctioned. Callaway is free to suggest that a
6 P. W/ K* p2 }* M z9 q' O0 Iplayer could have doped beforehand and fooled the test at the game, but this
, o5 u# t0 `, U+ l U' `possibility is certainly ruled out for Ye.' \ O# Z/ @7 Q# B
! D* ^ P E0 x, s+ C( YOver all, even though Callaway did not falsify any data, he did (8 N! e+ d8 f4 S
intentionally or not) cherry-pick data that, in my view, are far too
: K) M! _) U* n; ~suggestive to be fair and unbiased. If you want to cover a story of a
1 w# V( E6 F1 N) \7 s' fsuspected doping from a scientific point of view, be impartial and provide
2 n( m9 O; k2 Mall the facts for the reader to judge. You are entitled to your. I$ N& j6 A& ?
interpretation of the facts, and the expression thereof in your piece,
5 c0 r6 C' N. {8 }4 o0 m( M: a, f9 Iexplicitly or otherwise, but showing only evidence that favours your
3 g. L9 ~6 ?; ]argument is hardly good science or journalism. Such an article in a journal5 V# h6 o/ t2 B7 _# P
such as Nature is not an appropriate example of how scientific research or
_5 |1 r. h' e2 w& u% x* vreporting should be done. |
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