 This incipient atomism met with a determined synechist rebuttal, initiated by John Duns Scotus (c. 1266–1308). In his analysis of the problem of “whether an angel can move from place to place with a continuous motion” (Opus Oxoniense, see Grant 1974, §52) he offers a pair of purely geometrical arguments against the composition of a continuum out of indivisibles. One of these arguments is that if the diagonal and the side of a square were both composed of points, then not only would the two be commensurable in violation of Book X of Euclid, they would even be equal. In the other, two unequal circles are constructed about a common center, and from the supposition that the larger circle is composed of points, part of an angle is shown to be equal to the whole, in violation of Euclid’s axiom V.