In almost all cases we are involved in the world in an ordinary, and more involved, way. We are usually doing things with a view to achieving something. Take for example, a hammer: it is ready-to-hand; we use it without theorizing. In fact, if we were to look at it as present-at-hand, we might easily make a mistake. Only when it breaks or something goes wrong might we see the hammer as present-at-hand, just lying there. Even then however, it may be not fully present-at-hand, as it is now showing itself as something to be repaired or disposed, and therefore a part of the totality of our involvements. In this case its Being may be seen as unreadiness-to-hand. Heidegger outlines three manners of unreadiness-to-hand: Conspicuous (damaged; e.g., a lamp's wiring has broken), Obtrusive (a part is missing which is required for the entity to function; e.g., we find the bulb is missing), Obstinate (when the entity is a hindrance to us in pursuing a project; e.g., the lamp blocks my view of the computer screen).