it's the fallacy of the beard. if she lets you drink without ID then some other guy less obviously adult will try it as well and then an even younger guy and so on - at what point does she say no you're obviously not an adult ! and if she does the guy will want to fight. only thing she can do is ask everyone for an ID including 80 year old grandpas - it seems stupid but really YOU'RE THE FUCKING IDIOT FOR NOT HAVING AN ID

not having an ID proves that in fact you are a child and shouldn't be drinking

as does your leaving a shit to make a "point"

the point being that YOU'RE A FUCKING RETARD !