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Lambda expressions with no parameters in Haskell and / or lambda calculus
In eager languages like Scheme and Python, you can use a lambda expression without parameters to delay evaluation, e.g. in Scheme (Chicken Scheme):
#;1> (define (make-thunk x) (lambda () (+ x 1)))
...
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If Scheme is untyped, how can it have numbers and lists?
Scheme is said to be just an extension of the Untyped Lambda Calculus (correct me if I am wrong). If that is the case, how can it have Lists and Numbers? Those, to me, look like 2 base types. So I'd ...