A three seater sofa with a windowsill to its left. Person A sits on the left side of the sofa and uses it to put their drinks on it. Person B sits on the right side of the sofa and puts their drink on the floor, down the side of the sofa.
Person A has knocked B's drink over a fair few times now and person B gets angrier each time. Saying A should remember that their is a drink on the floor. Person A thinks B should put their drink on the coffee table or fireplace 3 steps away, a drinknon the floor is bound to be knocked over. Person B says this is unfair. Person A says B is being lazy.
Who is right?