However, the reasons for "questioning" must be explained. Your "questioning" itself is a negative conclusion to the questioned theory. -"XXX theory is in doubt." You can also let the readers draw their own conclusions, or draw conclusions from your statement. )

There are many articles that only question the conclusion! This kind of article shows that XXX needs further study. Your query about "a certain theoretical conclusion" is a denial of the previous theoretical conclusion and a promotion of theoretical research.