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# Every photograph, because it involves the light rays that

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Manager
Joined: 16 Oct 2003
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Every photograph, because it involves the light rays that [#permalink]

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30 Mar 2004, 10:09
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Every photograph, because it involves the light rays that something emits hitting film, must in some obvious sense be true. But because it could always have been made to show things differently than it does, it cannot express the whole truth and, in that sense, is false. Therefore, nothing can ever be definitively proved with a photograph.

Which one of the following is an assumption that would permit the conclusion above to be properly drawn?

(A) Whatever is false in the sense that it cannot express the whole truth cannot furnish definitive proof.

(B) The whole truth cannot be known.

(C) It is not possible to determine the truthfulness of a photograph in any sense.

(D) It is possible to use a photograph as corroborative evidence if there is additional evidence establishing the truth about the scene photographed.

(E) If something is being photographed, then it is possible to prove definitively the truth about it.
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30 Mar 2004, 11:19
A is the answer. I will explain if the answer is correct.

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Manager
Joined: 16 Oct 2003
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Kudos [?]: 4 [0], given: 0

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30 Mar 2004, 11:34
As always, you are right

Please explain your answer now.
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A 750 aspirant.

Kudos [?]: 4 [0], given: 0

SVP
Joined: 30 Oct 2003
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Kudos [?]: 114 [0], given: 0

Location: NewJersey USA

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30 Mar 2004, 18:00
Premise 1 : Any photographs reveals everything that it captures using light emitted from source. Since light conveys the true information whatever photo captures is also truth.
Premise 2 : But the photograph can be altered to show things differently.

Conclusion : Since showing things differently that the original does not convey truth then photgraphs cannot be made to prove anything

Underlying assumption : Any alteration does not convey the truth and cannot be the proof.

A - Exactly states the above assumption (if you negate this then the argument breaks )
B - Too strong a statement (if photograph is not altered [ watch the bold faced "can" ) then it can convey the truth
C - Same as B
D - This is out of scope
E - If you negate this then the argument does not break because the negated statement is synonymous with the conclusion.

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30 Mar 2004, 18:00
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# Every photograph, because it involves the light rays that

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