 The views touched on in this section represent only a sampling of the various accounts of the free play which have been offered. A useful survey is offered by Guyer (2006), who classifies various accounts under three heads: “precognitive”, according to which the play of the faculties is a preconceptual state, falling short of cognition (for example his own 1979 account),; “multicognitive”, in which the free play represents the playful application of a multiplicity of concepts, and thus a kind of cognitive excess (for example Allison 2001); and “metacognitive”, in which the manifold is represented as having a unity which goes beyond what is required for cognition; Guyer’s own view in his 2006, in contrast to that of his 1979, favours the latter approach. Guyer (2009) discusses a further variety of approaches; more recent discussions include Gorodeisky (2010, 2011), Matherne (2014), Küplen (2015), Ostaric (2017), and Filieri (2021).