inheritance question

[Guilherme]

# OK
module ProjectName
end

# I haven't defined ProjectName::Numeric. And It does not raise an
exception!!!!!
class Animal < ProjectName::Numeric
end

# The most interesting thing:
Animal.superclass # => ::Numeric

That happens for every native classes.

The problem is that my library relies on that kind of exception. I
always get that kind of misbehaviour when I use ProjectName::Numeric,
ProjectName::Integer or whatever.

I'm using ruby 1.9 + windows.

Thanks,
G