[nomenclature] What is a bug?

[Justin Johansson]

On 13/10/2010 12:19 AM, Simen kjaeraas wrote:
> Justin Johansson <no at spam.com> wrote:
>
>> Perhaps this topic could be posted as
>> "[challenge] Define just exactly what a bug is".
>>
>> I trust this topic will yield some interesting conversation.
>
> Unwanted behavior? I guess that might be a tad simplistic.

Thanks, at least a trying response gratefully received.:-)

What is "unwanted behavior" then to exact a formal definition of the same?

- JJ