not that I know of
used for answering that you think something is not true, although you are not completely certain
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Ways of saying that you do not know or understand
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
vocal fry
a speech habit in which a speaker lowers their voice at the end of a sentence
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dray
a type of cart pulled by a horse and used in the past for carrying barrels of beer
Open Dictionary
conflict mineral
a mineral which is mined in a place where there is armed conflict, and sold to help pay for weapons
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