contestable
adjective uk/kənˈtes.tə.bəl/ us/kənˈtes.t̬ə.bəl/
可争论的;可质疑的
A contestable statement, claim, legal decision, etc. is one that is possible to argue about or try to have changed because it may be wrong.
What really happened was, and remains to this day, obscure and contestable. 真实情况在过去模糊不清、充满争议，到现在仍然如此。
business, finance & economics specialized（新公司比较容易进入的）可竞争的（市场）
A contestable market is one that it is fairly easy for new companies to enter.