I think you missed the point - this is what they mean by "defined so loosely as to be uninformative." By saying "in some sense" you are allowing arbitrarily abstract definitions of the term "computer" thereby making the term itself no longer useful.
I think you missed the point - this is what they mean by "defined so loosely as to be uninformative." By saying "in some sense" you are allowing arbitrarily abstract definitions of the term "computer" thereby making the term itself no longer useful.