“There is plenty of empirical evidence that would suggest there might be some validity in his sagely words.”

“The very definition of an empirical statement says that it has to be able to be refuted, in principle, by empirical evidence.”

“The only way that you can have confidence in it is to have some empirical experience yourself.”

“The results are a stable, nonempirical measure of spontaneous, unconscious choices.”

“Perception is either empirical or nonempirical.”

“In 1947 Geyl initiated a long and often bitter debate with the English historian Arnold Toynbee, criticizing Toynbee's work for what he called its artificiality, nonempirical basis, and theological assumptions.”