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this is one of kaplan's. Ionized oxygen is known to

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CEO
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this is one of kaplan's. Ionized oxygen is known to [#permalink] New post 05 Dec 2003, 02:56
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this is one of kaplan's.


Ionized oxygen is known to contain large numbers of particles X and Y. Repeated lab tests have shown that whenever particles X and Y collide, they produce particle Z. Since the air supply in the offices of the electrical power plant has been shown not to contain any Z at all, it is safe to conclude that that the oxygen in the offices' air supply has not become ionized.

The reasoning above is flawed because the author


A. confuses necessity and sufficiency
B. does not take into account the possibility of improper test conditions
C. relies on the assumption that if a phenomenon can take place, it is bound to take place
D. draws a conclusion despite evidence that is self-contradictory.
E. fails to take into account that other particles can be formed when particles X and Y collide


please explain your choice

thanks
praetorian
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 [#permalink] New post 05 Dec 2003, 03:15
whenever particles X and Y collide, Z is born. However, there is no evidence that X and Y should collide all the time. So, oxygen may in fact be ionized but free from Zs.
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 [#permalink] New post 05 Dec 2003, 22:20
C..
author states that Z is produced when X and Y collide. what if the phenomena--collision--doesn't happen?
  [#permalink] 05 Dec 2003, 22:20
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this is one of kaplan's. Ionized oxygen is known to

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