 Unlike Greek atomists, Abu al-Hudhayl—regarded as the founder of kalām atomism—posited that atoms were indiscernible from one another even in size or shape. Rashed (2005) argues for the distinctness of al-Hudhayl’s atoms from both ancient Greek or Indian antecedents, since atoms were conceived as Euclidean points and not as extended material bodies. Rashed stresses the importance of the conception of atoms as in motion at an instant, connecting it to the development of a notion that bodies occupying infinitesimal locations could possess motion as a dynamic property, and to a treatment of mathematical properties that were not merely regarded as abstracted from bodies, as in the Aristotelian tradition (Rashed 2005). Al-Nazzān, a prominent early critic of atomism, tried to solve paradoxes about motion over infinitely divisible continua with the alternative thesis that motion consisted in an imperceptible ‘leap’ from one location to another.