From the POD:
The idea behind polymorphism is that if Bar inherits from Foo, then I should be able to use an object of type Bar wherever I'd normally use Foo.
That makes it sound like you're equating polymorphism with inheritance.

In reply to Re^5: Introducing MooseX::hasn't by Arunbear
in thread Introducing MooseX::hasn't by tobyink

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