What is the meaning and proper usage of 凭什么？ I was watching a TV show and heard them using the expression 凭什么 to say 'why' - I hadn't heard this with this exact meaning before, so I'm wondering what the proper meaning is in English, and what the proper meaning is in Mandarin?
"凭什么” is something similar to "who do you think you are to say i can't do it?" or "you're not qualified to judge me"