in reply to Re^5: "strong typing" is potentially ambiguous
in thread (Completely OT) - Hero(i)n programming language on Slashdot

*blinks* That's really funny, and shows how out of practice I am with formal definitions. I was trying to get at the "quacks-like-a-duck" definition for types. *ponders*

Maybe this is better: A type T is the set of values for which any operation in a given set of operations O is closed over.

I noticed on Lambda that some were complaining about defining types in terms of sets. I'm trying to figure out how you define types without sets ...

As for the term "class" ... isn't a class a coder-defined aggregation of data and coder-defined behaviors? So, in some sense, it would be a coder-defined type, so long as the behaviors were closed over the class ... ?

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