>>552 原文では次のように言っています。
Intention is a phenomenon that only emerges when a complex organism
finds itself in a complex environment. Roughly speaking, intention
can emerge (but may not) whenever there is a real possibility of
choice among affordances.
Reed (1993) The Intention to Use a Specific Affordance
In R. H. Woziak & K. W. Fischer (Eds.), Development in context. Earlbaum.