# Modeling the Late Avery Andrews

**URL:** <http://discourse.iapct.org/t/modeling-the-late-avery-andrews/7128>\
**Category:** CSG1993\
**Created:** [September 3, 1993, 3:31am UTC](http://discourse.iapct.org/t/modeling-the-late-avery-andrews/7128 "1993-09-03T03:31:22Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![William\_T\_Powers2](http://discourse.iapct.org/letter_avatar_proxy/v4/letter/w/c67d28/32.png) [@William\_T\_Powers2](http://discourse.iapct.org/u/William_T_Powers2)\
**Post date:** [September 3, 1993, 3:31am UTC](http://discourse.iapct.org/t/modeling-the-late-avery-andrews/7128/1 "1993-09-03T03:31:22Z")

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[From Bill Powers (930902.2130 MDT)]

Avery Andrews (930903.0920) --

I love your systems analysis of the university workings. Note  
that a systems analysis isn't necessarily a control system  
analysis: independently acting entities can interact in lots of  
ways that have nothing to do with control theory: positive  
feedback, for example. The longer you blow off the class, the  
more reluctant you become to show up because the Dean's wrath  
grows with every day of your absence.

Your suggestion of combining Prolog and analog modeling of this  
situation is ingenious, whether or not you meant it flippantly.  
It's probably doable, by someone who understands both modes of  
modeling. I notice, however, that in your sketch of how the model  
would be constructed, you end up with a model of the Dean and a  
model of Andrews, but I didn't see any model of The University  
mentioned.

> **···**
>
> --------------------------------------------------------------  
> Best,
> 
> Bill P.