Some Ans. Questions 2014 by -'Abdu'l-Bahá- 1 Para

Know, therefore, that what the people possess and believe to be true is liable to error. For if in proving or disproving a thing a proof drawn from the evidence of the senses is advanced, this criterion is clearly imperfect; if a rational proof is adduced, the same holds true; and likewise if a traditional proof is given. Thus it is clear that man does not possess any criterion of knowledge that can be relied upon (83:7)

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