Similarly, Michael Kremer suggested that Wittgenstein's distinction between saying and showing could be compared with Gilbert Ryle's famous distinction between "knowing that" and "knowing how". Just as practical knowledge or skill (such as riding a bike) is not reducible to propositional knowledge according to Ryle, Wittgenstein also thought that the mastery of the logic of our language is a unique practical skill that doesn't involve any sort of propositional "knowing that", but rather is reflected in our ability to operate with senseful sentences and grasping their internal logical relations.