The proposition “Either it is day or it is night” works well in a disjunctive argument, but not as well in a friendly conversation.
The proposition “Either it is day or it is night” works well in a disjunctive argument, but not as well in a friendly conversation.
「不是白天就是晚上」这样的说法放在对立的争论当然没有问题，但并不适合友善的交谈。