Bruce,
I have already answered you (maybe you didn’t see) that I made a mistake in year of the central book Maturana published with Varela. I have 1987 revised edition not 1989. But originaly “The Tree of knowledge” (the biological roots of human understanding) was published in 1979. There are mostly described biological experiments and simple experiments how to find out why and how nervous system function as closed system and with no black spots or holes. Sensed “picture” of reality with holes happens if the image of object falls into the area of retina where the optic nerve emerges. Experiment described in the book which can make anybody shows hole in the sensed “picture”.
In literature on the end of my presentation on Cybernetics Society I put just this book as reference. But beleive me it’s enough of experiments to make a point.
I have a request for you Bruce. Could you look to our last conversation and answer me if it’s possible. It seems that my answers are not published along with yours. Is there something I should know ?