cotton bags 6th Berlin Biennale

i like the graphic design of this greyish green bag designed for the 6th Berlin Biennale. it illustrates numerous corrections of an exessively revised text. but actually, on a closer glance, you'll see there never has been any text behind the corrections. the only linguistic feature in this graphic (except the biennale logo) is a question mark at the end. searching for any linguistic sense just keeps you ending up with a question mark. on and on.