The A.s.a. H. project has involved work in all but perhaps a half dozen or so of the subfields* (dynamical systems, diagrammatic reasoning, ...) that make up AI research. I had not planned on this, it simply proved necessary. It looks like nearly all of the subfields really are important and work in any of them can be a contribution. This breadth of coverage of the subfields may be the main difference between "weak or narrow AI" and "strong AI."
* See my blog of 9 September 2010.