To know nothing about something; to be completely ignorant.
什么也不知道。
明·冯梦龙《警世通言》卷十五小学生望后便倒，扶起，良久方醒。问之一无所知。”
When asked about the ancient ritual, she was completely clueless, like a person who knew nothing.
Learn the next connected idiom: 一无所知 (yī wú suǒ zhī) → 知法犯法 (zhī fǎ fàn fǎ)
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