We focus on Byrne & Russon's argument that
program-level imitation is driven by hierarchically organized goals,
and the related claim that to establish whether observed behavior is
evidence of program-level imitation, empirical studies of imitation
must use multi-stage actions as imitative tasks. We agree that goals
play an indispensable role in the generation of action and imitative
behavior but argue that multi-goal tasks, not only multi-stage tasks,
reveal program-level imitation.