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Is the use of "not" in this sentence correct or not?

Don't communicate until the phone line is not fully secured.

Kindly advise.

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  • 2
    It doesn't make any sense.
    – Hot Licks
    Commented Nov 19, 2019 at 1:56
  • Hot Licks ... thank you. Making sense is another thing. I am just trying to see if its use here is correct or incorrect.
    – Qureshi
    Commented Nov 19, 2019 at 2:03
  • It's incorrect because it's incoherent. Syntax does not require coherence, as Chomsky has demonstrated; but correctness, whatever you may think it means, does. Commented Nov 19, 2019 at 2:19
  • If one wanted to disseminate misinformation, and the line was fully secured, these instruction would make sense.
    – Davo
    Commented Nov 19, 2019 at 2:37

1 Answer 1

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Well, you have a double negation in your sentence, so you're basically saying "wait for the phone line to be unsecure/unsafe, and then start communicating". From a grammatical standpoint, that sentence is 100% correct; there's nothing wrong with it. But, that's probably not what you meant to say (who would want to communicate over a dangerous, unsecure phone connection?). What you probably meant was, "wait for the phone line to be secure, and then start communicating". In that case, you would write:

Don't communicate until the phone line is fully secured.

EDIT: changed "insecure" to "unsecure"

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  • Unsecure and insecure mean different things. :)
    – Davo
    Commented Nov 19, 2019 at 4:26
  • @Davo you are correct. It should be "unsecure" instead of "insecure". Commented Nov 19, 2019 at 5:28
  • Thanks a million for the kind input.
    – Qureshi
    Commented Nov 19, 2019 at 7:05

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