lǎo / shī / zài / kè / shàng / jiǎng / dào / le / Gōng / sūn / Lóng / de / bái / mǎ / fēi / mǎ / lùn

老师在课上讲到了公孙龙的白马非马论。

The teacher mentioned Gongsun Long's "a white horse is not a horse" argument in class.