Discussing the long-term potential of a romantic partner:
Betsy: "I think it's 0.5% chance it would work out long-term."
Randolf: "If it's below 1%, then just consider whether it would be enjoyable in the short term."
Betsy: "Well, maybe it's more like 2%."
Randolf: "Ah, that makes all the difference. Now you can expect to be married by 80, instead of past 200."