Checking if a string is null

[Manfred Nowak]

Bruno Medeiros wrote

> I'm frankly surprised you doubt it, but I have to say that's your
> problem.

Such statements stood at the beginning of all science. If somebody 
would say, "the world is a disk, made by Bruno Medeiros" and another 
one would say that he does not believe in this statement, your sentence 
above would fit into that situation quite nicely.

-manfred