Meanings

fire alarm system

anti-intellectualism

knowledge economy

cognitive bias

work injury prevention training

complete ignorance (usu. in reference to feigning)

innocent (e.g. child)

without noticing

knowledge-based society

heart seeking knowledge

content is the philosopher's stone, that turns all it touches into gold

he who knows, does not speak; he who speaks, does not know

stupidity

battle of wits

ignorance of Jōdo Shinshū practitioners (who only chant the Namu Amida Butsu and have little knowledge of other parts of Buddhism)

he who knows, does not speak; he who speaks, does not know

knowledge is power

completely unknown (usu. of people)

you can make friends anywhere

for shame!