"I read it in a book" is to many a sufficient warranty of truth, but not to the thinker. "What book?" asks the careful mind. "Who wrote it? What does he know about the subject and what right has he to speak on it? Who recognizes him as authority? With what other recognized authorities does he agree or disagree?" Being caught trying to pass counterfeit money, even unintentionally, is an unpleasant situation. Beware lest you circulate spurious coin.
