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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 JIANG7 e& O: Q Z% B# y
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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7 E" l; c( [* k: l( J thttp://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html5 A% j4 ?, M' s8 [% r0 Z1 j7 k# C
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FROM LAI JIANG, Department of Chemistry, University of Pennsylvania& K6 }4 \% |8 J' D( ]- i7 h- U
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It is a shame to see Nature — which nearly all scientists, including myself& y A: g& S: f0 u, @% V1 V
, regard as one of the most prestigious and influential physical-science
( L" w. F* N E/ ?magazines — publish a thinly veiled biased article like this. Granted, this
7 _+ G8 o: t: I% b; {8 ~4 ]is not a peer-reviewed scientific article and did not go through the
1 z) g/ D- t$ Y' }; Q/ S+ A0 Dscrutiny of picking referees. But to serve as a channel for the general r6 o" P+ Y( J1 C# X
populace to be in touch with and appreciate science, the authors and editors$ h/ E' C4 a1 t: p
should at least present the readers with facts within the proper context, `0 O- u" G8 r% `( L
which they blatantly failed to do.
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First, to identify Ye’s performance increase, Ewen Callaway compared her
9 e* i5 v! L0 K2 K# X* hOlympic 400-metre IM time with her performance at the World Championships in7 j7 T l& l! U
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
/ o2 g* e W4 G _anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
& c( G+ a/ b/ d9 |! Y) {+ Z: A8 j n6 \personal best was 4:33.79 at the Asian Games in 2010. This leads to an
0 c% k+ ^' c3 Q! `8 yimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the/ Z3 D: p$ v P. q
difference between the gold and silver medal, I see no reason for 5.38 s to
, w! l7 U" u) g! E. `2 c8 gbe treated as 7 s.* y; e# _% B' r: ^: C& d0 Z
; \" f8 ]4 F d2 i6 m2 P( JSecond, as previously pointed out, Ye is only 16 years old and her body is
- J7 K: |' n9 A. A) R' p2 [still developing. Bettering oneself by 5 seconds over two years may seem
5 I; p! D# U$ B8 fimpossible for an adult swimmer, but it certainly happens among youngsters.: n' E) K5 }3 H6 m
An interview with Australian gold medallist Ian Thorpe revealed that his 400
- f8 ^% z2 g. j4 {-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
7 z0 J0 ^, N1 q6 bFor regular people, including Callaway, it may be hard to imagine what an+ x9 V6 V/ A! j8 `- ]3 \! o$ Q
elite swimmer can achieve as he or she matures and undergoes scientific and- [; I$ o4 I( `2 I: n" t
persistent training. But jumping to the conclusion that it is “anomalous”
3 Y; O, O. N# ?, Y6 ubased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.
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# o# |/ Z+ Q% V7 ^: B6 V* dThird, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook1 z) U7 R% ?2 l& [" a% _9 v
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in; m" [* H9 Q; x: f _/ i. n' b0 [4 k
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
9 T) k% `. r6 Q6 u- ^1 d0 _) hhe chose not to push himself too hard and to conserve his energy for later, C ~8 ?, X2 K$ h8 b% B! t( d
events (whether this conforms to the Olympic spirit and the ‘use one’s
+ o# N! t+ H# y- H8 o6 `best efforts to win a match’ requirement that the Badminton World
. l0 c0 D, w7 P( J& _Federation recently invoked to disqualify four badminton pairs is another+ ]$ k, h* I8 h" g' [! l+ V( q- Z
topic worth discussing, though probably not in Nature). Ye, on the other
: _. z9 O* @* k6 l" y+ @, chand, was trailing behind after the first 300 metres and relied on freestyle) \, g8 _+ a* g; ]/ h! y
, in which she has an edge, to win the race. Failing to mention this
/ d8 f6 V) B- x- }$ x+ J$ l# ustrategic difference, as well as the fact that Lochte is 23.25 seconds0 a4 \0 E( P* j7 Z
faster (4:05.18) than Ye overall, creates the illusion that a woman swam7 R6 k2 t( w1 V- @
faster than the best man in the same sport, which sounds impossible. Putting" f8 K/ M; c0 p$ L( f
aside the gender argument, I believe this is still a leading question that
" m3 W, P% `! `, y/ r& P1 _implies to the reader that there is something fishy going on.
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8 G+ {9 ]; o( [2 @& b1 O1 BFourth is another example of cherry-picking. In the same event, there are
( a- Z% O M) o6 Q+ gfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93
0 F# ?- c9 r+ ~1 ys) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
' X9 Y I' M" T) H6 C2 r), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns7 a7 C4 p' f* _6 D: \4 g
out, if we are just talking about the last 50 metres in a 400-metre IM,: d8 m m4 j9 c" w- R
Lochter is not the example I would have used if I were the author. What kind3 X9 B1 B; E6 g# D% f# m
of scientific rigorousness is Callaway trying to demonstrate here? Is it7 m6 J" `8 R2 b3 Y, O
logical that if Lochter is the champion, we should assume that he leads in
7 V$ ]) ~ W3 U0 I* O& w2 Tevery split? That would be a terrible way to teach the public how science$ ^/ X) t6 z0 _7 ]9 c1 g$ H1 z
works.
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and! N1 c0 R- r" h9 @0 ]# j4 G
implies that a drug test cannot rule out the possibility of doping. Is this1 Z) l) K& A# s4 q' _0 }" I$ @1 _
kind of agnosticism what Nature really wants to teach its readers? By that
6 X4 h8 F2 n+ Z: o# Q2 n1 _standard, I estimate that at least half of the peer-reviewed scientific
9 A, y1 s) v+ [9 } |papers in Nature should be retracted. How can one convince the editors and9 L6 ~8 n5 a& |7 o) _+ M8 I
reviewers that their proposed theory works for every possible case? One
# h V5 e: y- R7 R/ H7 @4 Ecannot. One chooses to apply the theory to typical examples and to/ l' |& T" b9 u3 X k
demonstrate that in (hopefully) all scenarios considered, the theory works/ D' z X' [+ r. w4 S6 Z
to a degree, and that that should warrant publication until a counterexample
! t& {2 _ t- b2 M( T% J4 @is found. I could imagine that Callaway has a sceptical mind, which is
+ d% v$ ^! o1 V+ x% G! Vcrucial to scientific thinking, but that would be put to better use if he
% q) \% B/ m# @2 Z! f0 kwrote a peer-reviewed paper that discussed the odds of Ye doping on a highly! B8 U5 s' B% S4 L6 ^& ?3 w
advanced, non-detectable drug that the Chinese have come up with in the
1 \! ], c8 G4 o" vpast 4 years (they obviously did not have it in Beijing, otherwise why not" Q- B! o: D6 @6 ~4 {
use it and woo the audience at home?), based on data and rational derivation
% n- O7 v7 N: i. This article, however, can be interpreted as saying that all athletes are
: I8 M8 @! G1 m6 F c6 Qdoping and the authorities are just not good enough to catch them. That may
. C. e; R% G- e! K3 {be true, logically, but definitely will not make the case if there is ever a- y+ V/ d* v! z4 D( m
hearing by the governing body for water sports, FINA, to determine if Ye
3 z$ i/ [9 Q6 A" Q' C+ rhas doped. To ask whether it is possible to obtain a false negative in a- E2 g" H Z+ H
drug test looks like a rigged question to me. Of course it is possible:
& ~% P8 h$ m! `0 w* h; gother than the athlete taking a drug that the test is not designed to detect
! O( s% Q0 ?. ^6 M; c, anyone who has taken quantum 101 will tell you that everything is
9 B; D, J# X/ i# ~6 k) }$ p+ d8 bprobabilistic in nature, and so there is a probability that the drug in an9 q% {' A! W) w: e5 q
athlete’s system could tunnel out right at the moment of the test. A slight! f, _& {& a; [8 z7 U! W4 }
chance it may be, but should we disregard all test results because of it?
_: l& N6 e" gLet’s be practical and reasonable, and accept that the World Anti-Doping8 i" X* s2 a! f' g+ r7 P+ W
agency (WADA) is competent at its job. Ye’s urine sample will be stored for* l, t" L, q! W4 w) t& U
eight years after the contest for future testing as technology advances.
) F+ J' x5 n; ^+ `* m. A5 ]5 r! BInnocent until proven guilty, shouldn’t it be?! q8 G9 w# {. S- g+ A" z. H
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Sixth, and the last point I would like to make, is that the out-of-
7 Y# Z3 b' p) h% m i n! f( bcompetition drug test is already in effect, which Callaway failed to mention) X) g# L0 W! l X" ]
. As noted in the president of WADA’s press release, drug testing for
, s3 I5 P4 E! E2 xOlympians began at least six months before the opening of the London9 G9 Z& X. l k8 d# A
Olympics. Furthermore, 107 athletes have been banned from this Olympics for2 O- X, T; @5 G6 r. @0 Q: x
doping. That may be the reason that “everyone will pass at the Olympic( c' Q+ q5 G4 {& U, V* `' T T o' S, J
games. Hardly anyone fails in competition testing” — those who did dope4 [! B i" v5 \' G# I/ ?6 i/ O
have already been caught and sanctioned. Callaway is free to suggest that a
& U# {7 t6 i% ^- O0 L yplayer could have doped beforehand and fooled the test at the game, but this" x6 q) i$ `+ f: | O
possibility is certainly ruled out for Ye.
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" w/ ?8 F) p0 L# c, w5 f& [2 }9 [2 nOver all, even though Callaway did not falsify any data, he did (: I4 h! ` A6 e
intentionally or not) cherry-pick data that, in my view, are far too/ ^8 F2 y+ ?" n) G* C9 ]5 n1 v3 l
suggestive to be fair and unbiased. If you want to cover a story of a" M5 E9 H4 Y; a8 x x
suspected doping from a scientific point of view, be impartial and provide) H1 g2 A" B6 N
all the facts for the reader to judge. You are entitled to your9 l; d& c% U% q( B, N; r
interpretation of the facts, and the expression thereof in your piece,1 w1 }. \6 R) y+ ]) o7 b4 i
explicitly or otherwise, but showing only evidence that favours your5 u& [6 s0 q( r0 A- y! Z1 k
argument is hardly good science or journalism. Such an article in a journal v, M: C B) ~4 z6 I4 J/ [) T* \3 d4 c
such as Nature is not an appropriate example of how scientific research or
& T4 r5 o& g; s! t, nreporting should be done. |
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