  The classic Sorites, or ‘heap argument’, seeks to show that even 10,000 grains do not make a heap, on the ground that (a) three grains do not, and (b) the addition of one grain could never be enough to turn a non-heap into a heap: however often a further grain is added, no precise boundary between non-heap and heap is ever found. Applications of this argument form were widespread in the Hellenistic age, and the Stoic logician Chrysippus wrote many books trying to solve it. Diodorus is a likely source or inspiration for this Hellenistic preoccupation (see previous paragraph).