Whittle it on down

[Random832]

On Thu, May 5, 2016, at 04:41, Steven D'Aprano wrote:
> > There's no situation where "&&&&&" and "     " will exist in the given
> > dataset, and recognizing that is important. You don't have to account
> > for every bit of nonsense.
> 
> Whenever a programmer says "This case will never happen", ten thousand 
> computers crash.

What crash can including such an entry in the output list cause?

Should the regex also ensure that the data only includes *english words*
separated by space-ampersand-space?