Are going fishing. They pick out a boat and arent having any luck.They go out further into the lake and start catching a lot of fish."Wow Jessica! We got to remember this spot for next time" says George."Oh I know! We should make an X at the bottom of the boat to mark our spot"says Jessica. George just looks at Jessica and laughs."Um that would never work."Why not?" says Jessica." Duh " says George " Because what makes you think we'll get the same boat.