student: can i borrow a pencil
teacher: i don't know, CAN you?
student: yes, also colloquial irregularities occur frequently in any language and since you and the rest of our present company understood my intended meaning, being particular about the distinctions between "can" and "may" is purely pedantic and arguably pretentious
me: why can't you want me like the other boys do?
me: oh wait, what other boys
