missing 'xor' Boolean operator

[Ethan Furman]

Scott David Daniels wrote:
> Ethan Furman wrote:
> 
>>   and returns the last object that is "true"
> 
> A little suspect this.
> _and_ returns the first object that is not "true," or the last object.
> 
>>   or  returns the first object that is "true"
> 
> Similarly:
> _or_ returns the first object that is "true," or the last object.
> 

Thanks for the correction.

~Ethan~

> 
> --Scott David Daniels
> Scott.Daniels at Acm.Org