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# choice

Basis Function Combinator

Use a Boolean value to select one of two items. :

    A B false choice
    ----------------------
    A


    A B true choice
    ---------------------
      B

Currently Python semantics are used to evaluate the \"truthiness\" of
the Boolean value (so empty string, zero, etc. are counted as false,
etc.)

Gentzen diagram.

## Definition

if not basis.

## Derivation

if not basis.

## Source

if basis

## Discussion

Lorem ipsum.

## Crosslinks

Lorem ipsum.