Anna Cardinaletti and Michal Starke (1999)'s paper discusses the fact that it is always true that a coordinated personal pronoun cannot refer to a non-human entity.
My question is why it is true.
I would think in English, "they" can refer to human or nonhuman. When "they" is coordinated, the pronoun can only refer to human but not nonhuman. (why???)
To better explain it, these two English examples are given:
(1)They and the besides are big. [+human]
(2)They are big. [+human][-human]
Is it the same in English? My question is why? When it is coordinated, why does it only refer to the human entity?
Thanks for your time!