What would we do without NULL?

Question

I once read that having nullable types is an absolute evil. I believe it was in an article written by the very person who created them(in Ada?) I believe this is the article

Answer 1

We'd use option types for the (very) few places where allowing a null value is actually desirable, and we'd have a lot less obscure bugs since any object reference would be guaranteed to point to a valid instance of the appropriate type.