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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# x' G0 z0 g F7 U% s" n
如果是中国长大的,英语能到这种程度真是很不简单。 y# o9 y( T; D0 p# x0 x
) m3 B# v$ g* }7 v" \http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html: T, ~% R3 N* y+ a8 f5 q
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania# z F- L6 h; {+ k- }- F( l7 @) i
- D! i# [6 v+ a( x D4 c" [It is a shame to see Nature — which nearly all scientists, including myself
2 r1 ~0 _8 x2 R" t+ @, regard as one of the most prestigious and influential physical-science
( g- A9 {7 U8 Y: C* u/ ^1 Bmagazines — publish a thinly veiled biased article like this. Granted, this7 I* g' U9 E. v! v F
is not a peer-reviewed scientific article and did not go through the+ Y: h$ k2 M3 V- [7 _+ k/ K5 s9 q
scrutiny of picking referees. But to serve as a channel for the general" L% P9 z8 o& s' V: y
populace to be in touch with and appreciate science, the authors and editors
3 |* `. q% l% z. T& m, q* b! Ushould at least present the readers with facts within the proper context,: O9 r; A Q6 `
which they blatantly failed to do.
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4 X: e% {5 {! S9 j% d6 A, dFirst, to identify Ye’s performance increase, Ewen Callaway compared her! S3 g$ r1 J9 O* R3 ^
Olympic 400-metre IM time with her performance at the World Championships in
4 m5 J; ]" J% i) {2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “' V6 H- S: w S. `
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous# G* u! A% I: a- Y2 a3 d3 E0 w
personal best was 4:33.79 at the Asian Games in 2010. This leads to an
5 S5 }8 `+ m- i8 \. n M) jimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the
2 T. @% q$ V; ~9 i+ S( W M: [difference between the gold and silver medal, I see no reason for 5.38 s to
- ^& B; ~& X+ `9 B8 w; Hbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is3 a0 I9 b4 Y8 D% [
still developing. Bettering oneself by 5 seconds over two years may seem
% t" M. x1 G6 G$ v, c mimpossible for an adult swimmer, but it certainly happens among youngsters.
5 u/ B' ^3 b4 z7 D# j0 t8 M1 n6 n2 wAn interview with Australian gold medallist Ian Thorpe revealed that his 400
! k& B. K# F1 ?-metre freestyle time improved by 5 seconds between the ages of 15 and 16.8 Q/ e! Y" n+ n4 M; X Y: V) J
For regular people, including Callaway, it may be hard to imagine what an
4 G$ ]4 ]& ?; f1 m/ y) welite swimmer can achieve as he or she matures and undergoes scientific and
1 P7 j( d4 E2 l7 t9 i; x6 C. `2 ?! ipersistent training. But jumping to the conclusion that it is “anomalous”& N! ?* N2 A: u. k' n( d, ?7 a
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.: y+ z5 ?/ N E- |3 E
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook0 K( E: D* L6 Y7 j5 f& H; h
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
8 D$ x5 [ @, V; jthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so
- x" d2 ]& y. o7 O) nhe chose not to push himself too hard and to conserve his energy for later
7 y+ O. [9 @. F' C& X' g. }6 Devents (whether this conforms to the Olympic spirit and the ‘use one’s
( T% P0 C, a% Qbest efforts to win a match’ requirement that the Badminton World2 k8 j/ s4 C- {
Federation recently invoked to disqualify four badminton pairs is another$ c* j% Q/ o4 c; g7 G
topic worth discussing, though probably not in Nature). Ye, on the other& O! D l6 A( g' W0 g' K ~, m% w
hand, was trailing behind after the first 300 metres and relied on freestyle! T- H' }) ?0 A. o/ v* B
, in which she has an edge, to win the race. Failing to mention this
/ H, M. j, {6 u! n3 u# gstrategic difference, as well as the fact that Lochte is 23.25 seconds: i5 j4 A! R: T0 U, }) A+ m: G
faster (4:05.18) than Ye overall, creates the illusion that a woman swam& u/ y+ H: d$ ~; p
faster than the best man in the same sport, which sounds impossible. Putting: | ?: s) m8 T }
aside the gender argument, I believe this is still a leading question that/ w9 @8 a$ n1 k4 Q- b( D1 F
implies to the reader that there is something fishy going on.
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) t! ]' ] D& T, QFourth is another example of cherry-picking. In the same event, there are
* g! t3 F! Y2 c& \, n; Jfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93: [& X9 Q/ }. x* ]
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
: G2 s# p) b* g4 L9 n2 _3 n), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns8 R \1 c9 s& s3 V: ~4 i1 H9 g
out, if we are just talking about the last 50 metres in a 400-metre IM,
/ y$ e. a7 i+ x2 J f7 V* OLochter is not the example I would have used if I were the author. What kind; |3 f" J/ W8 P6 F: g: [; u1 q
of scientific rigorousness is Callaway trying to demonstrate here? Is it
/ b6 _# u" w0 Z2 llogical that if Lochter is the champion, we should assume that he leads in
0 Y1 v# l; f0 L1 t4 ^every split? That would be a terrible way to teach the public how science
0 R5 A* s2 |5 t" E4 gworks.
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8 @) S8 q' u* r* L# M5 S' n! PFifth is the issue I oppose the most. Callaway quotes Ross Tucker and
; m3 y2 w! b/ \5 |# w' O3 himplies that a drug test cannot rule out the possibility of doping. Is this% C' f& q$ W2 x+ F
kind of agnosticism what Nature really wants to teach its readers? By that
9 b4 I$ E# E j& a# ?6 N" U& W3 X" g+ ~standard, I estimate that at least half of the peer-reviewed scientific, r% ]6 Z2 p. `
papers in Nature should be retracted. How can one convince the editors and
8 k P; ?* E r8 \& rreviewers that their proposed theory works for every possible case? One
% i1 P* @. E& t* S. {cannot. One chooses to apply the theory to typical examples and to
]( ^/ ?+ U' x# N" B! v9 Ydemonstrate that in (hopefully) all scenarios considered, the theory works' ], y1 ~" w, N. K2 B. r
to a degree, and that that should warrant publication until a counterexample2 N" ~( y- l: G
is found. I could imagine that Callaway has a sceptical mind, which is
( q3 ?& k9 G8 A% ~9 \' dcrucial to scientific thinking, but that would be put to better use if he
* K' R9 y& w% Z" bwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly- O- M2 C, D3 _' k2 l* f0 t2 h" D/ G
advanced, non-detectable drug that the Chinese have come up with in the
, n, Q2 | {1 L+ A" c0 fpast 4 years (they obviously did not have it in Beijing, otherwise why not
; U+ u3 n, ]/ |! h) \7 Luse it and woo the audience at home?), based on data and rational derivation
; W* ^7 h o& n7 f. This article, however, can be interpreted as saying that all athletes are
# g% z# E3 [9 W& `) O4 E @) C3 j+ x. xdoping and the authorities are just not good enough to catch them. That may2 U% H! L/ @- `) M# _9 W
be true, logically, but definitely will not make the case if there is ever a9 D3 W. H& H) _. q* ]9 [
hearing by the governing body for water sports, FINA, to determine if Ye% i6 y/ |% \2 i8 `% D" U
has doped. To ask whether it is possible to obtain a false negative in a
' f& ]' i" e& U: F# g. wdrug test looks like a rigged question to me. Of course it is possible:2 O! x, [) k6 C+ P
other than the athlete taking a drug that the test is not designed to detect0 M! ?- x: j* J4 c, i. o
, anyone who has taken quantum 101 will tell you that everything is3 J+ X) K4 p6 m3 L' a
probabilistic in nature, and so there is a probability that the drug in an
* D: w# |8 d' s* B* D& J0 {- N7 }athlete’s system could tunnel out right at the moment of the test. A slight" B% h9 N5 x0 p& ?
chance it may be, but should we disregard all test results because of it?* ]9 }! f: ^# ?- x9 G
Let’s be practical and reasonable, and accept that the World Anti-Doping
" N8 T+ r3 n) `8 z+ N5 kagency (WADA) is competent at its job. Ye’s urine sample will be stored for1 r& p( \2 S9 C, O0 {0 C: Q: B
eight years after the contest for future testing as technology advances.
4 s, M# j1 J! G$ E0 YInnocent until proven guilty, shouldn’t it be?+ [% V* \9 N* }5 \4 n7 c
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Sixth, and the last point I would like to make, is that the out-of-
9 ^# u' Y6 `2 a+ c& R# h4 Scompetition drug test is already in effect, which Callaway failed to mention1 |" _: V2 J" e- z: E0 D0 i
. As noted in the president of WADA’s press release, drug testing for
8 L" A0 s0 }+ |Olympians began at least six months before the opening of the London
8 ]5 [: I7 w+ pOlympics. Furthermore, 107 athletes have been banned from this Olympics for
( z9 h; t8 ], X( l& edoping. That may be the reason that “everyone will pass at the Olympic+ ^/ z% M2 t0 Q
games. Hardly anyone fails in competition testing” — those who did dope1 [0 d6 d( C9 H$ [9 r8 @
have already been caught and sanctioned. Callaway is free to suggest that a
, k- D0 \( N3 n6 c* B+ _player could have doped beforehand and fooled the test at the game, but this
" j3 {3 p/ m$ {' R# A" d! ?possibility is certainly ruled out for Ye.& e3 b8 Y- U: r/ s% @3 Z: i
1 e; ^- r3 N$ A9 x( ^7 fOver all, even though Callaway did not falsify any data, he did (3 ] `, O, g7 }+ _
intentionally or not) cherry-pick data that, in my view, are far too, @! U) P7 V7 D. T1 D% h( f
suggestive to be fair and unbiased. If you want to cover a story of a
1 ]% @' `0 Q5 g- Vsuspected doping from a scientific point of view, be impartial and provide
2 r8 N" `# b1 k5 x& lall the facts for the reader to judge. You are entitled to your& A m3 n# q, }, E5 s
interpretation of the facts, and the expression thereof in your piece,
4 k9 I3 m, A2 X3 I2 jexplicitly or otherwise, but showing only evidence that favours your
( g3 e4 ]8 T# Bargument is hardly good science or journalism. Such an article in a journal* i. q# k8 g7 o8 g
such as Nature is not an appropriate example of how scientific research or
% j; C1 a/ |. f1 B/ f6 vreporting should be done. |
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