“A false-statement requires deceit and distortion for someone to buy it, but a truthful-statement sells itself.”

“The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.”

“The only ethical principle which has made science possible is that the truth shall be told all the time. If we do not penalize false statements made in error, we open up the way for false statements by intention. And a false statement of fact, made deliberately, is the most serious crime a scientist can commit.”

“To make a statement that one knows is false is more honest than to make a statement that one knows is true.”

“The opposite of a correct statement is an incorrect statement. The opposite of a profound truth is another profound truth (Niels Bohr)." By this, he means that we require a larger reading of the human past, of our relations with each other, the universe and God, a retelling of our older tales to encompass many truths and to let us grow with change.”

“The basic principles of logic dictate that a statement cannot be both true and false at the same time... and that a statement must be either true or false... Lucy is lying, or she is crazy, or she is telling the truth. She can’t be some combination, and she can’t be none of those things... The laws of logic dictate that she must be one of them... Notice how practical common sense about the suposed impossibility of other worlds doesn’t come into the equation.”