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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
$ K" ~1 }5 y& A e# c2 d9 u: M( u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.html6 W# p7 g% Q7 Q) D; S `
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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 myself
+ {0 \7 a( A8 E, regard as one of the most prestigious and influential physical-science
5 [0 k9 \5 m" Z& X5 w& bmagazines — publish a thinly veiled biased article like this. Granted, this
! T: }. r4 w4 U/ d A, P4 m& V mis not a peer-reviewed scientific article and did not go through the
; J+ e1 [6 ]5 `scrutiny of picking referees. But to serve as a channel for the general2 [& B G( y4 ?; ^! L; F% O
populace to be in touch with and appreciate science, the authors and editors# Q+ s2 ^7 R" ^$ c6 ]6 B
should at least present the readers with facts within the proper context,
4 }8 A4 b6 K: m. b! a5 Mwhich they blatantly failed to do.
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+ P) T! v' I6 C# {6 v5 BFirst, to identify Ye’s performance increase, Ewen Callaway compared her
! [0 P: ?* j, R' O5 XOlympic 400-metre IM time with her performance at the World Championships in) w8 ]% G8 e& I! z. Q% z
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “* o5 ` D' Y d* z- D1 \5 Q0 b5 z
anomalous” improvement of around 7 seconds (6.72 s). In fact, her previous
( }/ ^+ S! ~+ u% T, j: npersonal best was 4:33.79 at the Asian Games in 2010. This leads to an
& G; j2 G* _$ vimprovement of 5.38 seconds. In a sporting event in which 0.1 s can be the* P8 P/ [9 \- w2 M$ k. \- p
difference between the gold and silver medal, I see no reason for 5.38 s to
1 _5 \6 v1 j z9 b3 lbe treated as 7 s.
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Second, as previously pointed out, Ye is only 16 years old and her body is8 ]& L" ^) u3 ]. u+ l/ {! \- h3 J
still developing. Bettering oneself by 5 seconds over two years may seem
+ R W( U/ i' C, D. Yimpossible for an adult swimmer, but it certainly happens among youngsters.% h3 @; g% k. M# @& z9 T1 Z" o
An interview with Australian gold medallist Ian Thorpe revealed that his 400/ f8 w4 V: R* \& {8 |1 v8 n& X. R
-metre freestyle time improved by 5 seconds between the ages of 15 and 16.0 O# `7 ]; ~7 K: b
For regular people, including Callaway, it may be hard to imagine what an4 Q4 i8 W$ E8 f& W% \/ Q
elite swimmer can achieve as he or she matures and undergoes scientific and
4 g8 \0 p5 f. z- U+ Q. {' E: ^persistent training. But jumping to the conclusion that it is “anomalous”
' a: H+ x0 Z [# bbased on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.! I/ T* b- T( U
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook
6 V5 D) q6 p; |* j4 kexample of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in
. o7 ~$ j. m1 m" G' n# mthe last 50 metres, but Lochte had a huge lead in the first 300 metres, so& L% [1 C* H8 s. M# }) u: c
he chose not to push himself too hard and to conserve his energy for later' D5 z. g% h" F/ f3 x1 C0 W
events (whether this conforms to the Olympic spirit and the ‘use one’s" j3 a! e, q/ j, `& h, P
best efforts to win a match’ requirement that the Badminton World
! g- n5 X% f3 R3 \" P$ vFederation recently invoked to disqualify four badminton pairs is another% J k9 o- G2 W: \4 s" O7 }, E
topic worth discussing, though probably not in Nature). Ye, on the other3 s5 p/ Q% ~: E m. i
hand, was trailing behind after the first 300 metres and relied on freestyle( _/ ?7 N5 {1 j6 Z" U% { u
, in which she has an edge, to win the race. Failing to mention this J0 J& h- u: W* ~
strategic difference, as well as the fact that Lochte is 23.25 seconds
/ E/ N/ o( \1 H# |1 r7 F xfaster (4:05.18) than Ye overall, creates the illusion that a woman swam
5 i7 r/ j- g- @) L0 j% `faster than the best man in the same sport, which sounds impossible. Putting. k/ G; L$ Q! ]8 u0 ]
aside the gender argument, I believe this is still a leading question that9 M5 }6 N6 O0 f9 M7 l1 J
implies to the reader that there is something fishy going on.
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: g2 u$ _) t0 xFourth is another example of cherry-picking. In the same event, there are3 q8 u. Q7 z4 Q; T! U3 r
four male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93# c+ L% D7 i. `/ t7 J8 e
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s
3 q0 J2 V# n# s& g: a), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns
. M/ x& \+ c3 |) E, xout, if we are just talking about the last 50 metres in a 400-metre IM,+ L% x4 e$ m3 A1 ]/ B0 G: \* v
Lochter is not the example I would have used if I were the author. What kind' B/ G1 X) R4 ^& m2 [( J! F& u
of scientific rigorousness is Callaway trying to demonstrate here? Is it/ u6 T5 c$ P; z- @. l, t
logical that if Lochter is the champion, we should assume that he leads in& D- n4 d0 l' Z* K5 B. v* E
every split? That would be a terrible way to teach the public how science9 h5 v/ `" [# \; c
works.- o, }9 n* B2 r) e0 _+ S O
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and3 T3 e8 U+ l: d- f
implies that a drug test cannot rule out the possibility of doping. Is this& l2 V h' e$ F' H, l- {' E9 k
kind of agnosticism what Nature really wants to teach its readers? By that8 {" R& o$ x E _( O, |5 z/ k+ v
standard, I estimate that at least half of the peer-reviewed scientific9 A# r) h8 l8 J8 q- G) N: \
papers in Nature should be retracted. How can one convince the editors and
$ R2 U( Z9 [! P% _6 P4 l' c, h) Mreviewers that their proposed theory works for every possible case? One8 {1 Z# Q8 m$ `: w
cannot. One chooses to apply the theory to typical examples and to
1 q0 ~3 M0 s9 _. j" f" c- d- l Bdemonstrate that in (hopefully) all scenarios considered, the theory works, `3 v/ b& w; E, ~. R
to a degree, and that that should warrant publication until a counterexample; y0 N& }! z! f# ?
is found. I could imagine that Callaway has a sceptical mind, which is4 F: ]8 y. {) d/ y( b
crucial to scientific thinking, but that would be put to better use if he
; e3 E9 G. a: C1 t4 x* M" e8 owrote a peer-reviewed paper that discussed the odds of Ye doping on a highly' v" N% E& u: I
advanced, non-detectable drug that the Chinese have come up with in the
, G8 c8 L5 Z N9 m; a3 Gpast 4 years (they obviously did not have it in Beijing, otherwise why not
& b* r& p( H% b# ause it and woo the audience at home?), based on data and rational derivation$ c- Q; o: w5 y% e
. This article, however, can be interpreted as saying that all athletes are
8 G y" C% M0 Qdoping and the authorities are just not good enough to catch them. That may0 e* S: `% y' s% w* ~
be true, logically, but definitely will not make the case if there is ever a6 p r: ^5 C6 z9 k) U, `
hearing by the governing body for water sports, FINA, to determine if Ye
/ E0 {3 t( @. |; Q, r1 qhas doped. To ask whether it is possible to obtain a false negative in a
, J1 t, g2 P. H5 Q }, |drug test looks like a rigged question to me. Of course it is possible:
6 t8 u. T3 U. k+ Sother than the athlete taking a drug that the test is not designed to detect
3 n! Q* i% X( {' t# b- z4 y# ?, anyone who has taken quantum 101 will tell you that everything is+ z- P$ J/ J8 y* l% C; e: E+ d
probabilistic in nature, and so there is a probability that the drug in an
8 b9 h- b2 B4 a) J G5 N# {/ X- Q8 [athlete’s system could tunnel out right at the moment of the test. A slight
8 }/ Q# R* ]; I$ u1 Fchance it may be, but should we disregard all test results because of it?% s% t1 M, j- r9 c; p$ A+ `4 _% E
Let’s be practical and reasonable, and accept that the World Anti-Doping" z f, [$ |- a8 E R' g$ m, N+ f
agency (WADA) is competent at its job. Ye’s urine sample will be stored for1 E( {3 G3 j. w- ?/ A
eight years after the contest for future testing as technology advances.$ V! q4 g7 V0 W3 J1 v, b6 [8 L }
Innocent 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-
! k: E$ u/ Y& E' E' _3 {5 Z& Y$ [competition drug test is already in effect, which Callaway failed to mention0 J9 v d( T' |0 l3 u1 {1 A
. As noted in the president of WADA’s press release, drug testing for
3 T2 c+ S: l$ s4 ~5 BOlympians began at least six months before the opening of the London! _5 I1 { Q+ d
Olympics. Furthermore, 107 athletes have been banned from this Olympics for
; b8 N o" V' b6 A$ z" fdoping. That may be the reason that “everyone will pass at the Olympic
" W' J( o( {* }8 }: `games. Hardly anyone fails in competition testing” — those who did dope
& ?, R* [: Q' o. ghave already been caught and sanctioned. Callaway is free to suggest that a) \; {% U8 @3 R8 n7 ?8 `3 C
player could have doped beforehand and fooled the test at the game, but this
6 c7 C, d2 \- Y3 |3 ppossibility is certainly ruled out for Ye.% \: v" k( G( J7 m. W/ ]
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Over all, even though Callaway did not falsify any data, he did (: l9 F7 K$ t+ [ ~) [; n
intentionally or not) cherry-pick data that, in my view, are far too* ~" X8 W0 P8 J* g
suggestive to be fair and unbiased. If you want to cover a story of a) \, R5 s6 e6 S, u: R* E, r
suspected doping from a scientific point of view, be impartial and provide
% u: {% \, h3 k! ~/ H( Tall the facts for the reader to judge. You are entitled to your
; ?, m% g1 x- o+ Finterpretation of the facts, and the expression thereof in your piece," v# Z- T9 {) y" V6 k# i6 m' v+ \$ F
explicitly or otherwise, but showing only evidence that favours your
7 b2 ^, g+ U5 w! [argument is hardly good science or journalism. Such an article in a journal
/ j# t9 S6 ^; N0 f# rsuch as Nature is not an appropriate example of how scientific research or
! H# v/ }& L" L0 mreporting should be done. |
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