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Ways of saying that you do not know or understand

know of

used for answering that you think something is not true, although you are not completely certain

don’t ask me

used for telling someone that you do not know the answer to their question when you are annoyed or surprised that they have asked you

your guess is as good as mine

used for telling someone that you know as little about something as they know

(that’s a) good question

used as a way of saying that you do not know something

I couldn’t tell you

used for saying that you do not know the answer to a question, especially when you do not want to be helpful

you may/might well ask

used for showing that you think someone’s question is difficult to answer

how should/do I know?

used for saying in an annoyed way that you do not know something

not for the life of me

used for emphasizing that you cannot remember or understand something at all

what is someone on about?

used when you do not understand what someone is talking about

who can say?

used for saying that no one knows the answer to a particular question or knows what will happen in the future

SOLE

… a teaching method in which groups of children learn independently using a computer linked to the internet

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Open Dictionary

bankster

a derogatory word used for referring to people in the banking and investment industry who are thought of as taking serious risks in order to increase their own earnings …

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