I think not

idiom

Definition of I think not

somewhat formal
used to express a negative opinion about a question one has just askedIs this a good use of our tax dollars? I think not.

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“I think not.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/I%20think%20not. Accessed 27 Oct. 2020.

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