Using the word notwithstanding

[Tamara]

Hi

Could you characterize 'proper context(s)' for using the word notwithstanding?

With what I came across was The-Very-Formal-Text with the sentence:

(v) It is not responsible for ensuring that Members follow the terms and conditions notwithstanding these terms and conditions outline behaviour that is unacceptable on the service;

In an example from my dictionary:
Notwithstanding their lack of experience, they were an immediate success.
notwithstanding = 'despite' or 'in spite of'

and also can used in the meaning 'although' or 'regardless of'.

notwithstanding = not+with+standing
Logical. OK.

I'd like to learn this, new for me, word.
But would it sound/ look strange if I put it in informal speaking or writing?

Tamara
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[Alan]

Hi Tamara,

This is a kind of rhetorical word and has a certain gravitas about it. In military descriptions you would read: Notwithstanding the serious danger in which he found himself Corporal Smith continued to stay at his post. I think it's a bit of a no-no in informal speech/writing.

Alan
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[Tamara]

Thank you, Alan.

By the way, could you explain the meaning of 'gravitas' - the word you used.
My dictionary refused to help me to understand it.

Wikipedia's explanation

[Van Khanh]

Hi Tamara,

I think "gravitas" here is a formal word meaning "solemnity".

K

[Yankee]

Hi Tamara

This online dictionary might also be helpful:
http://www.thefreedictionary.com/gravitas

Amy

[Alan]

Hi Tamara,

Gravitas means simply seriousness.

Alan
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English as a Foreign Language
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[Tamara]

Hi

Thank you all. Now, I hope, I've got it.
Tamara
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It’s impossible to learn swimming without entering the water…