“All bad arguments are one of three types: The Straw Man, The Weak Man, and The Hollow Man.”— Scott Alexander
“On two occasions I have been asked, 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question.”— Charles Babbage
“Euclid taught me that without assumptions there is no proof. Therefore, in any argument, examine the assumptions.”— Eric Temple Bell
“For in the long run, either explicitly or implicitly, logic rests upon metaphysics, and metaphysics rests upon a theory of knowledge.”— Robert Adamson
“Avoid the 'everybody does it' argument. It is a form of moral and intellectual laziness.”— Ayaan Hirsi Ali
“Numbers have a way of taking a man by the hand and leading him down the path of reason.”— Marilyn vos Savant
“What is a dogma, if not a religious idea, expressed in a logical form, and fixed in this form?”— Ferdinand Christian Baur
“The validity of the processes of analysis does not depend upon the interpretation of the symbols which are employed, but solely upon the laws of their combination.”— George Boole