[plt-scheme] The role of proper and improper lists?

aleks at cs.brown.edu (Aleks Bromfield) writes:

> Lists hold an indefinite amount of homogeneous data; structs hold a fixed amount
> of heterogeneous data.

Forgive my ignorance, but isn't (list 'a 1 '()) a list of heterogenous
data?  (Or are you only suggesting a preferred way of usage?)

-- 
Chris