Why "flat is better than nested"?

[alex23]

On Oct 27, 7:58 pm, Robin Becker <ro... at reportlab.com> wrote:
> >> "I know that that that that that boy said is wrong!".
>
> well they say nested is hard. How about this break down
>
> I know that X that a boy said is wrong. (any boy)
> I know that X that the boy said is wrong. (a single boy)
> I know that X that that boy said is wrong. (a specific boy)

But your original statement maps out to:

I know that X that that that boy said is wrong.

So this would apply to a specific 'that boy', hence Stefan's
question :)