Imagine you tell me you have a flying, pink,
invisible unicorn in your house. (Pretend you don't see the
contradiction in that statement already.) And you then ask me to 'prove
my disbelief.' WTF man.
The moment I say 'no I do not believe
you' I am proving my disbelief. Which then immediately drops the onus
onto you to prove your claim, by showing me proof your flying horse
exists.
Makes sense, right?