""I exist" does not follow from "there is a thought now." The fact that a thought occurs at a given moment does not en…"

"Between the workable empiricism of the early land measurers... of ancient Egypt and the geometry of the Greeks in the…"

"It has fallen to the lot of one people, the ancient Greeks, to endow human thought with two outlooks on the universe …"

"With the completion of Euclid's Elements... For the first time in history masses of isolated discoveries were unified…"

"Robert [Grosseteste] became much interested in science and scientific method … He was conscious of the dual approach …"

"I cannot see why it is necessary that every deduction from algebra should be bound to certain conventions incident to…"

"Experience has convinced me that the proper way of teaching is to bring together that which is simple from all quarte…"

"The long chains of simple and easy reasonings by means of which geometers are accustomed to reach the conclusions of …"

"The two operations of our understanding, intuition and deduction, on which alone we have said we must rely in the acq…"

"The two great conceptual revolutions of twentieth-century science, the overturning of classical physics by Werner Hei…"