原推:@overhtmoon520 @NathanpmYoung @ESYudkowsky @slatestarcodex @eigenrobot @s8mb @robertwiblin @willmacaskill @moskov The reason for this is that taking care of 2*n children takes less than twice the effort of taking care of n children.
They can share resources, entertain each other, etc.
(I have two sisters ~15y younger than myself so this comes in part from personal experience)
https://twitter.com/VitalikButerin/status/1529106962121601024