孰

人非生而知之者，孰能无惑

rén fēi shēng ér zhī zhī zhě , shú néng wú huò

Knowledge is not innate to man, how can we overcome doubt?

孰优孰劣

shú yōu shú liè

which of the two is better?

孰料

shú liào

who would have thought?

孰真孰假

shú zhēn shú jiǎ

what is true and what is fake

是可忍，孰不可忍

shì kě rěn , shú bù kě rěn

if this can be tolerated, what cannot? (idiom)