lǎo / shī / zhǐ / chū / zhè / duàn / lùn / zhèng / yǒu / chóng / yán / zhī / xián / jié / lùn / zhǐ / shì / huàn / le / gè / shuō / fǎ

老师指出这段论证有重言之嫌，结论只是换了个说法。

The teacher pointed out that this argument is arguably tautological; the conclusion merely restates the point.