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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
+ f5 A4 Z% h& 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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http://www.sas.upenn.edu/rappegroup/htdocs/People/LJ.html
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. z5 N* _8 ]; [ ^% rFROM LAI JIANG, Department of Chemistry, University of Pennsylvania+ p x$ Z& \6 a4 K+ V# d6 c
8 ?- \6 m! g6 c8 y1 pIt is a shame to see Nature — which nearly all scientists, including myself
7 c: p* `; s. X, regard as one of the most prestigious and influential physical-science
9 d# V U# K5 Y/ Y; P7 u" |5 H) `9 Dmagazines — publish a thinly veiled biased article like this. Granted, this3 T! _5 r/ Y3 r
is not a peer-reviewed scientific article and did not go through the
9 J# k2 o9 |) Y- I1 Zscrutiny of picking referees. But to serve as a channel for the general
/ i b5 C+ x, {1 H. npopulace to be in touch with and appreciate science, the authors and editors
: h" b# G" {& D5 P: |9 Qshould at least present the readers with facts within the proper context,
. a8 A0 J# }1 M' C% K/ dwhich they blatantly failed to do.+ I1 D' v- J' E) o, m4 F' d3 h
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First, to identify Ye’s performance increase, Ewen Callaway compared her
# f' ]! x! }6 EOlympic 400-metre IM time with her performance at the World Championships in; G9 A) u8 ?. n+ ~! ?
2011 (4:28.43 and 4:35.15, respectively) and concluded that she had an “
* M* ^. D8 g9 Q& x& b6 Sanomalous” improvement of around 7 seconds (6.72 s). In fact, her previous* h' ^# a5 J# ?' j, A2 ]% N
personal best was 4:33.79 at the Asian Games in 2010. This leads to an }+ w3 y) W" C/ D7 z0 T! F
improvement of 5.38 seconds. In a sporting event in which 0.1 s can be the
# h% Z4 L/ M7 y2 Mdifference between the gold and silver medal, I see no reason for 5.38 s to$ |0 \: P8 `0 m5 \0 |+ P- x9 z( Q
be treated as 7 s.2 `" _: M1 r8 V2 T" u- Q
0 x3 K9 D( \0 d b+ s* w2 ASecond, as previously pointed out, Ye is only 16 years old and her body is
( }' A# {# x8 o& o% wstill developing. Bettering oneself by 5 seconds over two years may seem
( A( O% c7 x3 m+ \7 H+ c" @% oimpossible for an adult swimmer, but it certainly happens among youngsters.4 `; U' C( x% k$ f
An interview with Australian gold medallist Ian Thorpe revealed that his 400
0 U# p# W: W. M- H3 B# v-metre freestyle time improved by 5 seconds between the ages of 15 and 16.
5 a$ \# U) w' r* ~2 A9 ?( \/ @; QFor regular people, including Callaway, it may be hard to imagine what an8 `% P/ p4 B( R6 ~2 a4 g# a
elite swimmer can achieve as he or she matures and undergoes scientific and8 r% U# ^" l4 W7 C
persistent training. But jumping to the conclusion that it is “anomalous”" u5 x; C7 J! a( R
based on ‘Oh that’s so tough I cannot imagine it is real’ is hardly sound.: D/ R, J3 h0 e' p: T! D2 r
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Third, to compare Ryan Lochte’s last 50 metres to Ye’s is a textbook+ k6 G" C5 Z* v7 ?& F8 u' E8 X
example of ‘cherry-picking’ your data. Yes, Lochte was slower than Ye in9 r, e5 R7 r6 W! J- m# j
the last 50 metres, but Lochte had a huge lead in the first 300 metres, so
; r: k, T3 Z" u! l+ N( r/ E$ Y$ She chose not to push himself too hard and to conserve his energy for later
0 n2 ^6 V/ t) V# Z" M$ ^6 t3 hevents (whether this conforms to the Olympic spirit and the ‘use one’s- I! p( F- [+ L/ y/ U: A
best efforts to win a match’ requirement that the Badminton World3 \5 n+ P: J* ^
Federation recently invoked to disqualify four badminton pairs is another
8 X) F2 t6 X6 H5 i0 Y6 Vtopic worth discussing, though probably not in Nature). Ye, on the other
7 y2 n K/ j" M, P) ~hand, was trailing behind after the first 300 metres and relied on freestyle; U; o" ?0 t8 R/ N) X$ \
, in which she has an edge, to win the race. Failing to mention this, H% G; M+ ?' _' A+ x
strategic difference, as well as the fact that Lochte is 23.25 seconds
8 T2 p. ^ W- H+ Ffaster (4:05.18) than Ye overall, creates the illusion that a woman swam9 L# Q; H+ y# C4 X8 p
faster than the best man in the same sport, which sounds impossible. Putting* B( k# i' ?& @. @0 x
aside the gender argument, I believe this is still a leading question that6 g& v1 k4 }! D# c; n6 r
implies to the reader that there is something fishy going on.
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Fourth is another example of cherry-picking. In the same event, there are
4 V+ p p! M8 M4 V$ Lfour male swimmers who swam faster than both Lochter (29.10 s) and Ye (28.93* W7 x" |" e: S) v0 h
s) in the final 50 metres: Kosuke Hagino (28.52 s), Michael Phelps (28.44 s& {: f3 e+ h* c$ E( d; G8 R7 Q, X1 t: q4 |
), Yuya Horihata (27.87 s) and Thomas Fraser-Holmes (28.35 s). As it turns# R) M& j: ~& t& t+ N" D! d
out, if we are just talking about the last 50 metres in a 400-metre IM,
$ K+ G+ s8 S" pLochter is not the example I would have used if I were the author. What kind
! v- f* T& X4 |, `( p$ Mof scientific rigorousness is Callaway trying to demonstrate here? Is it/ u, l2 M! g3 U. P+ h) j
logical that if Lochter is the champion, we should assume that he leads in! d' h, a' W" m
every split? That would be a terrible way to teach the public how science
5 ~+ A6 ?1 X6 `7 d1 y* b9 y- ^works.2 ~/ Q) K) N- ~/ I! ]
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Fifth is the issue I oppose the most. Callaway quotes Ross Tucker and# u4 o: X% b* k; ~3 Z; ]# {
implies that a drug test cannot rule out the possibility of doping. Is this5 A/ w* b H: o: J/ H0 ~
kind of agnosticism what Nature really wants to teach its readers? By that
1 X \: {: e) S& L/ u. wstandard, I estimate that at least half of the peer-reviewed scientific
' x0 M0 o& ~ \4 @8 X* Tpapers in Nature should be retracted. How can one convince the editors and# W9 B% @8 y( a7 P3 j3 V
reviewers that their proposed theory works for every possible case? One
5 B4 J* f; Z2 ccannot. One chooses to apply the theory to typical examples and to
3 f; A2 { q3 F: H$ G Q- kdemonstrate that in (hopefully) all scenarios considered, the theory works% h; I( }! P: R3 w9 K k! v G x
to a degree, and that that should warrant publication until a counterexample. A+ l* h& B$ V2 f' p" P9 L* P
is found. I could imagine that Callaway has a sceptical mind, which is% G, a: N- }5 F. W
crucial to scientific thinking, but that would be put to better use if he5 H) n$ K& d* g8 p4 ~' `* \
wrote a peer-reviewed paper that discussed the odds of Ye doping on a highly
8 \! m: n2 L6 k' Radvanced, non-detectable drug that the Chinese have come up with in the5 F2 s. ?! Z6 T; F9 |* F( R% D; O
past 4 years (they obviously did not have it in Beijing, otherwise why not+ \: L! k& \+ x+ W0 Z
use it and woo the audience at home?), based on data and rational derivation; i5 A3 T! q1 i( w) \1 C E
. This article, however, can be interpreted as saying that all athletes are
! E! b) ~7 O# U' o/ Sdoping and the authorities are just not good enough to catch them. That may8 y( l6 i( P( k$ I8 V6 s" X, E
be true, logically, but definitely will not make the case if there is ever a( u/ A' I: B; \8 a4 b
hearing by the governing body for water sports, FINA, to determine if Ye6 ]$ K `" S' _( V: f8 w: T
has doped. To ask whether it is possible to obtain a false negative in a
3 A" I7 d" n/ f, ]: ?* Q( `! G( j* Ndrug test looks like a rigged question to me. Of course it is possible:: p7 |$ Z, V! L) B/ p0 ~
other than the athlete taking a drug that the test is not designed to detect0 A, E0 S) \! t- \1 T" f
, anyone who has taken quantum 101 will tell you that everything is" N" T7 m* ^ L: Y' y. B
probabilistic in nature, and so there is a probability that the drug in an9 h' y! x/ y7 n8 n8 f' s
athlete’s system could tunnel out right at the moment of the test. A slight: r1 S" m4 V# T& L5 t
chance it may be, but should we disregard all test results because of it?% z' c' \# V- T, r2 \6 p. N
Let’s be practical and reasonable, and accept that the World Anti-Doping
! |; U9 |* b7 R6 A$ Aagency (WADA) is competent at its job. Ye’s urine sample will be stored for3 K. e8 @% U2 `6 v: B) N6 p
eight years after the contest for future testing as technology advances.+ m4 ^% X' R0 ~8 o4 q9 V4 X
Innocent until proven guilty, shouldn’t it be?
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) x8 I# G K( b0 ~) s5 ASixth, and the last point I would like to make, is that the out-of-- Y3 G( M! e3 s! r
competition drug test is already in effect, which Callaway failed to mention
& a$ h/ q$ b+ j! c1 u6 v8 G% ?- o. As noted in the president of WADA’s press release, drug testing for! B+ f- X/ _5 j- e
Olympians began at least six months before the opening of the London9 H! e; s$ x( K6 O1 x2 M7 W
Olympics. Furthermore, 107 athletes have been banned from this Olympics for( Y) z: }; E( ?0 W( Q
doping. That may be the reason that “everyone will pass at the Olympic
9 d9 b+ h) c' J/ z Rgames. Hardly anyone fails in competition testing” — those who did dope
$ ]7 s0 |$ O. v7 M$ T5 \have already been caught and sanctioned. Callaway is free to suggest that a4 g3 c4 Q4 v* g3 k
player could have doped beforehand and fooled the test at the game, but this
# C8 r8 E: T. Y: I& A7 _+ Fpossibility is certainly ruled out for Ye.7 w; C( M7 }( v6 ^! H
e) ?4 C' h. G- S' w& GOver all, even though Callaway did not falsify any data, he did (
9 b$ c# [4 n; V Zintentionally or not) cherry-pick data that, in my view, are far too
# C: L! |5 C6 z; Q; O' Esuggestive to be fair and unbiased. If you want to cover a story of a, v% [1 D: B6 }7 [) i4 K
suspected doping from a scientific point of view, be impartial and provide1 P' ~+ Z* ]+ i* s- z" g
all the facts for the reader to judge. You are entitled to your6 x* a7 N! @( H" d
interpretation of the facts, and the expression thereof in your piece,
; j& X. r' [- p6 dexplicitly or otherwise, but showing only evidence that favours your
7 Y* B0 J% @/ m4 ~argument is hardly good science or journalism. Such an article in a journal7 F/ `6 r1 p- B5 u
such as Nature is not an appropriate example of how scientific research or. y8 i/ a0 y; l, u. r3 [# O
reporting should be done. |
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