In the card game DOS, the sequel to UNO, there is a rule stating:
DOS RULE: If you ever have EXACTLY TWO CARDS in your hand, you must shout out "DOS!" (meaning "two"). If you forget to do so and another player calls out "DOS!" before you do, you must immediately draw two cards as a penalty.If this happens during your turn, do not add the penalty cards to your hand until the end of your turn.
At what exact moment is it considered that one have "said 'DOS!'"? Is simply producing the start of the word "DOS" vocally the moment that I've said it, or can I be caught if my opponent starts to say it to catch me but I finish the word before my opponent? How do other games handle this issue?