Most of us are rational thinkers prone to bouts of common sense on occasion.
We have a basic understanding of statistics, particularly probability, and realise that, for example, 1000-1 is a long shot.
But every now and then, all that common sense goes out the window and we fork over hard-earned cash for a yellow bit of paper covered in numbers.
Tomorrow's Big Wednesday jackpot of $20 million and Saturday's Lotto Powerball jackpot of $27 million is New Zealand's biggest combined lottery prize pool.
No one's suggesting anyone could win both (though theoretically they could) but given the way a large jackpot captures the collective imagination, those "sometime buyers" will be fancying their luck this week.