Sometimes we know how to implement the boxes we draw:
But all too often in artificial intelligence/cognitive architecture work the boxes are opaque. We have little or no idea what to put in them:
With Asa H I hope I have made clear (at least some ways in which) you can implement the boxes. (of my diagram at www.robert-w-jones.com , cognitive scientist, theory of thought and mind)
I went on and offered some actual code in my blogs of 10 Feb. 2011 and 14 May 2012.