He's all over the place, bringing up points, and immediately thinking of something new and different to say before finishing his original thought--I do that too, but it's almost painful to watch.
He's factually incorrect to say that Java is deficient as an OO language because it doesn't do mixins or multiple inheritance. Smalltalk is the archetypal OO language and it has the same Single Inheritance + interfaces mechanism that Java uses. Also, the specific case he mentions can be solved by using an Abstract class (or an Abstract class implementing an Interface, if one prefers)
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