Can answer to absolutely anything.
If something good happens to you it's fair
do's, if something bad happens to you it's fair
or if you havent listened to the question you were just asked, or the answer you just recieved, fair
do's will make everything ok, enjoy
1st person: Hey dude i got an A in my business exam
2nd person: Wow how did you do that?
1st person: I revised, bla bla bla yadda yadda yadda
2nd person: ohhhhhh fair do's