In my world, I have: food, not water; beer, not wine; eddie not ed; two feet, one hand; green, no blue; Nissan, no Toyota; Scully, no Mulder; wall & door, no ceiling; teeth, no mouth; balloons & Zeppelins, no planes; look, can’t buy; pissed, not mad
Continue giving examples, encourage students to add examples, approve/reject without explaining.