Socially a higher threshold should play a role than the above epsilon. There are things that are so low in probability (though much higher than epsilon) that establishing a contract/agreement on what should both of you do if they happen is deleterious for the relationship. Such as when a couple who thinks they disagree about abortion asks: What should we do if the condom and pill don’t work?
The probability is not so low. But the fight is too costly.
Socially a higher threshold should play a role than the above epsilon. There are things that are so low in probability (though much higher than epsilon) that establishing a contract/agreement on what should both of you do if they happen is deleterious for the relationship. Such as when a couple who thinks they disagree about abortion asks: What should we do if the condom and pill don’t work?
The probability is not so low. But the fight is too costly.
It’ll be even more costly to have the fight after the wife gets pregnant.