[plt-scheme] plai: lazyness and exercise 6.4.2

From: Shriram Krishnamurthi (sk at cs.brown.edu)
Date: Tue Aug 25 21:36:08 EDT 2009

You have at least a partial understanding of what is going on, which
is a start.  However, you haven't stated a concrete question.  What
precisely is the problem you're trying to solve (in your own words),
and how far do you think you've gotten?  Do you think you have a
solution that is correct but too complex, or one that is correct but
only partial, or no solution at all?


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