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

Likewise, at one time they would establish a thing by rational arguments and disprove it at another, again by rational arguments. So a philosopher would firmly uphold a view for a time and adduce a range of proofs and arguments to support it, and afterwards he would change his mind and contradict his former position by rational arguments (83:4)

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