Don Syme wrote:

> To take a very non-serious example, think of the rules that parents lay
> down for their children (which are often recursively referential, let
> alone contradictory :-)).  Induction corresponds to "you may only do
> what follows from the rules", whereas co-induction corresponds to "you
> may do anything that is not excluded by the rules".  For an empty set of
> rules an inductive child can do nothing, a co-inductive child can do
> anything.  

My son is a coinductive child with a buggy rule evaluator ;)

Alex

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