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# truthy

Basis Function Combinator

bool(x) -\> bool

Returns True when the argument x is true, False otherwise. The builtins
True and False are the only two instances of the class bool. The class
bool is a subclass of the class int, and cannot be subclassed.

Gentzen diagram.

## Definition

if not basis.

## Derivation

if not basis.

## Source

if basis

## Discussion

## Crosslinks