Heyes correctly points out some problems in primate theory of mind, but lacks a critical approach to children's theory of mind, and at times implies meta-awareness when discussing theory of mind. Also, in selecting pure experimental designs, she ignores its limitations, as well as the merits, and at times the necessity, of other methodologies.

From a developmental and comparative perspective, folk biology is a core “meme.” The universality and resistance to change in such core “memes” may be a function of the developmental timing of cognitive domains during childhood. Evidence from cognitive development in humans, monkeys, and apes is discussed. Suggestions for a developmental research program are offered.