"I agree with you there. What shall it be?"
"If we had some one here to count three for us, that would do, but seeing that we have not, we cannot do it for ourselves."
"Why not?"
"The one who counted would have just the shade of an advantage over the other."
"He should not take it."
"If he hesitated, the other fellow would have it."
"I don't understand."
"If I count, I can say three and shoot at the same moment, while it would take a fraction of a second for you to hear and shoot."
"There's something in that, I guess."