  But you see, it takes more effort to wash a potato and cut it into "wedges" than it does to make a rectangle. Also, the skin is left on jacket potatoes. Anything wrong with that? Potato wedges: perfect size for eating. Also, wedges can have a variety of flavours. With chips it doesn't seem to go down as well. There could always be a new kind of shop: "POTATO AND FISH" , hosting all kinds of potato products, including moonshine vodka. Yum. Vodka and chips. Or wedges as the case may be. 
