There is no well-defined boundary between honesty and dishonesty. The frontiers of one blend with the outside limits of the other, and he who attempts to tread this dangerous ground may be sometimes in one domain and sometimes in the other. – O. Henry, Rolling Stones, 1912

It is hard to believe that a man is telling the truth when you know that you would lie if you were in his place. – Henry Louis Mencken, A Little Book in C Major, 1916