shí / jiǔ / shì / jì / de / zhé / xué / jiā / men / guǎng / fàn / tǎo / lùn / le / shí / zhèng / zhǔ / yì / lǐ / lùn19世纪的哲学家们广泛讨论了实证主义理论Philosophers in the 19th century extensively discussed positivist theories.