[plt-scheme] HTDP, Section 14 - Flaw in "blue-eyed-ancestor?" ?

From: Matthias Felleisen (matthias at ccs.neu.edu)
Date: Sun Nov 23 19:29:26 EST 2003

P.S. There is also an exercise that explains how it can be "ancestor 
I must admit that there should be many more of those in the book that
distinguish the two notions.

On Sunday, November 23, 2003, at 03:11 PM, Guenther Schmidt wrote:

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> Hi,
> I might be mistaken but if the function "blue-eyed-ancestor?" is 
> supposed to evaluate to true of false for ancestors only, I believe it 
> would have to be rewritten.
> Also I believe that the "or" version of the function has the 
> additional advantage of returning the "child-struct" instead of merely 
> evaluating to true of false.
> Just guessing here.
> Cheers
> Guenther

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