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## getitem

Basis Function Combinator

    getitem == drop first

Expects an integer and a quote on the stack and returns the item at the
nth position in the quote counting from 0. :

    [a b c d] 0 getitem
    -------------------------
     a

Gentzen diagram.

### Definition

if not basis.

### Derivation

if not basis.

### Source

if basis

### Discussion

Lorem ipsum.

### Crosslinks

Lorem ipsum.