# Simulations and models often fail to capture important aspects of a real system ## Examples * We still can’t model exactly when a pencil will fall over * https://twitter.com/hardmaru/status/1284862752595427328?s=20 ### Related * [[Possible PARPA Projects]] <!-- #inbox #case-study/possible-gem --> [Web URL for this note](http://notes.benjaminreinhardt.com/Simulations+and+models+often+fail+to+capture+important+aspects+of+a+real+system) [Comment on this note](http://via.hypothes.is/http://notes.benjaminreinhardt.com/Simulations+and+models+often+fail+to+capture+important+aspects+of+a+real+system)