More than language is needed to represent and combine different core knowledge components.

We question Spelke's key claim that the medium, in which contents from different core knowledge systems can be represented and combined, is language-based. Recalling an episodic memory, playing chess, and conducting mental rotation are tasks where core knowledge information is represented and combined. Although these tasks can be by means of language, these tasks are not inherently language-based. Hence, language may be an important of an abstraction medium - not the medium as such.