Where does your guess works the best!
In my office whenever one of my colleague student says that today Professor won’t come, it happens in most cases.
Once I asked him the secret. He said " His wife wouldn’t have let him come"
I asked " Why ?"
He said " Because it is raining outside"
I said " whats the relation of raining and his not coming, might be he might catch cold"
He said " You won’t understand"
Well these days my guess works when there is a Pakistan SriLanka match 