whether vs whether or not :

whether or whether or not

“Whether” works fine on its own in most contexts: “I wonder whether Iforgot to turn off the stove?” But when you mean “regardless of whether”it has to be followed by “or not” somewhere in the sentence: “We need toleave for the airport in five minutes whether you’ve found your teddybear or not.”See also “.”

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  whether
  • Scan predicts whether therapy or meds will best lift depression
    Pre-treatment scans of brain activity predicted whether depressed patients would best achieve remission with an antidepressant medication or psychotherapy, in a study that may help mental health treatment decision-making move beyond trial-and-error. The study sought to identify a biomarker that could predict which type of treatment a patient would benefit from based on the state of his or her ...
    June 13, 2013 - Science Daily
  • Court to rule on whether Sisk records can be released
    The Eighth Judicial District Court will determine Monday whether the Keokuk Police Department is entitled to a protective order that would prevent the release of records regarding a sexual abuse lawsuit.
    June 13, 2013 - Keokuk Daily Gate City
  • Utah to decide whether to go greener in energy production
    Utah to decide whether to go greener in energy production by Taylor W. Anderson The Salt Lake Tribune Published Jun 12, 2013 05:04PM MDT Renewable energy developers representing more than $620 million in proposed wind and solar projects are awaiting a ruling by the state’s top utility regulators to decide whether they can move forward or must abandon Utah for greener states. The Utah Public ...
    June 12, 2013 - The Salt Lake Tribune
  whether or not
  • '50 Shades!' musical spoof finds the silly in sexy book
    Whether or not you've read the bestselling erotic romance novel '50 Shades of Gray,' you might laugh your face off when the parody '50 Shades! The Musical' arrives at Detroit's Fisher Theatre this weekend.
    June 13, 2013 - Detroit News
  • White House pushes back at Bill Clinton over Syria
    Washington (CNN) – President Barack Obama - said to be weighing whether or not to send lethal weapons to Syrian rebels - will not decide on further American involvement in the country's civil war with his critics' opinions in mind, the White House said Thursday. The pushback came as a response to comments made by […]
    June 13, 2013 - CNN Political Ticker
  • Do Mantle Plumes Exist? Mission Aims to Answer
    The mystery of whether or not giant plumes of hot rock from near Earth's core force volcanic island chains to form could soon be solved with the largest campaign ever to map such jets of magma beneath the Earth's surface.
    June 12, 2013 - LiveScience.com via Yahoo! News