This chapter draws heavily on recent work in developmental psychology to argue that humans infants, without instruction, given ordinary maturation in an normal environment, come to perceive a world of so-called Spelke objects (discrete, spatiotemoporally continuous items that undergo continuous motion) that enjoy properties, stand in relations, and exhibit ground-consequent dependencies. There is considerable evidence that humans enjoy these cognitive abilities due to evolutionary pressures. Thus, the Second Philosopher fine-tunes the last two components of her account to read: humans believe rudimentary logic because their cognitive apparatus allows them to detect KF-structures in the world, and humans are so-configured because they live in a largely KF-world and interact almost exclusively with its KF-features.
Keywords: developmental psychology, evolution, infant studies, KF-structure, properties, relations, Spelke object