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# Two paleontologists, Dr Tyson and Dr. Rees, disagree over

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Manager
Joined: 23 Jul 2008
Posts: 189
Two paleontologists, Dr Tyson and Dr. Rees, disagree over [#permalink]

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04 Sep 2008, 12:58
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0% (00:00) correct 100% (02:26) wrong based on 2 sessions

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Two paleontologists, Dr Tyson and Dr. Rees, disagree over the interpretation of certain footprints that were left among other footprints in hardened volcanic ash at site G. Dr. Tyson claims they are clearly early hominid footprints since they show human characteristics: a squarish heel and a big toe immediately adjacent to the next toe. However, since the footprints indicate that if hominids made those prints they would have had to walk in an unexpected cross-stepping manner, by placing the left foot to the right of the right foot. Dr. Rees rejects Dr. Tyson’s conclusion.
Which one of the following, if true, most seriously undermines Dr. Tyson’s conclusion?
(A) The foot prints showing human characteristics were clearly those of at least two distinct individuals.
(B) Certain species of bears had feet very like human feet, except that the outside toe on each foot was the biggest toe and the innermost toe was the smallest toe.
(C) Footprints shaped like a human’s that do not show a cross-stepping pattern exist at site M, which is a mile away from site G, and the two sets of footprints are contemporaneous.
(D) When the moist volcanic ash became sealed under additional layers of ash before hardening, some details of some of the footprints were erased.
(E) Most of the other footprints at site G were of animals with hooves.
Intern
Joined: 29 Jul 2008
Posts: 7

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04 Sep 2008, 13:18
B?

When the left foot and the right foot are put beside each other, it can be clearly seen that the outer toe is the biggest, this would make them bears feet.
Senior Manager
Joined: 29 Mar 2008
Posts: 347

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04 Sep 2008, 13:30
Agree with (B) as thats the only statement that actually talks about the shape of the foot prints and if a bear's foot print closely matches that of the footprints found, Dr.Tyson's conclusion is weakened.
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Director
Joined: 30 Jun 2007
Posts: 769

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04 Sep 2008, 13:30

Here argument assumes hominid footprints assume human characteristics and unexpected cross-stepping manner. The assumption can be weekend if we show some other animals have the foot prints that show human characteristics or other than unexpected cross-stepping manner.

(A) The foot prints showing human characteristics were clearly those of at least two distinct individuals. [This strengthens the Dr. Tyson’s Conclusion]

(B) Certain species of bears had feet very like human feet, except that the outside toe on each foot was the biggest toe and the innermost toe was the smallest toe [Here we are taking about footprints and pattern]

(C) Footprints shaped like a human’s that do not show a cross-stepping pattern exist at site M, which is a mile away from site G, and the two sets of footprints are contemporaneous.[Hold it]

(D) When the moist volcanic ash became sealed under additional layers of ash before hardening, some details of some of the footprints were erased. [irreverent]

(E) Most of the other footprints at site G were of animals with hooves. [irreverent]
VP
Joined: 05 Jul 2008
Posts: 1379

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04 Sep 2008, 13:52
It cant be C.

C actually strengthens Dr Tyson's argument by saying that the footprints possibly belong to C.

Manager
Joined: 28 Aug 2008
Posts: 98

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04 Sep 2008, 16:58
Agree with B

What is OA?
Senior Manager
Joined: 06 Apr 2008
Posts: 401

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06 Sep 2008, 10:46
IMO B)

Interesting Q
Re: Nice CR   [#permalink] 06 Sep 2008, 10:46
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# Two paleontologists, Dr Tyson and Dr. Rees, disagree over

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