It's an accurate statement: in fact, as your knowledge increases, the odds of a given event may fluctuate back and forth! Consider a card placed face down in f

It's an accurate statement: in fact, as your knowledge increases, the odds of a given event may fluctuate back and forth! Consider a card placed face down in front of you, randomly selected from a deck. Now you're allowed to turn over cards one at a time from the rest of the deck, and asked what the probability is that the face-down card is the ace of spades after every reveal. If the selected card isn't the ace of spades, the chances that it might be increase with every new reveal - until suddenly they become zero, when the ace of spades is revealed.