He always says that his dumb. doesn't know basic maths. Doesn't know any maths. Doesn't know the simplest maths doesn't know science doesn't know geography. Doesn't know much. He always says that his dumb. He knows that his dumb. He always says that his dumb. He always says that his dumb. He always says that his dumb. He always says that his dumb. He always says that his dumb.