1. Introduction

In linguistic terms, disjunction refers to the relationship established between two (or more) alternatives connected by the coordinator ‘or’. While English uses the same coordinator but different correlatives to represent declarative disjunction (‘either… or’) and interrogative disjunction (‘whether… or’), Mandarin uses different coordinators: huò 或 (other variants include huòshì 或是, huòzhě 或者, and huòzhěshì 或者是) in non-questions, and háishì 還是 in q…