Some Ans. Questions 1908 by -'Abdu'l-Bahá- 1 Para

Know then: that which is in the hands of people, that which they believe, is liable to error. For, in proving or disproving a thing, if a proof is brought forward which is taken from the evidence of our senses, this method, as has become evident, is not perfect; if the proofs are intellectual, the same is true; or if they are traditional, such proofs also are not perfect. Therefore, there is no standard in the hands of people upon which we can rely (298:2)

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