The recursion problem
	• Jacques was annoyed that Tony helped George – One proposition can be part of another proposition. How can we do this with neurons? • One possibility is to use “reduced descriptions”. In addition to having a full representation as a pattern distributed over a large number of neurons, an entity may have a much more compact representation that can be part of a larger entity. –  It’s a bit like pointers. – We have the full representation for the object of attention and reduced representations for its constituents. – This theory requires mechanisms for compressing full representations into reduced ones and expanding reduced descriptions into full ones.