With so much going on around us we're definitely in need of tools that filter. But today's noise may be tomorrow's music. We may find ourselves making a note of something that seems at present very significant, only to realize somewhere down the line that we've overlooked something that turns out to be truly worthwhile. So though filtering is necessary, almost by definition it has built-in disadvantages. We don't know what will cause us to say to ourselves "I didn't understand that back then, why didn't I take better note of it?". Chances are very good that that will happen with numerous issues and events, and we'll miss out on something important. At its essence life-logging seeks to minimize that possibility. The problem is that it does so at the cost of making everything equally important or significant, and to my mind that causes even greater problems.