
Using '4' instead of 'for' in the first paragraph really adds to its credibility.
( , Fri 17 Oct 2014, 15:02, Reply)

that's what the Government wants you to use.
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( , Fri 17 Oct 2014, 15:06, Reply)

'4' is used in a purely numerical sense. Still, using digits for low numbers is lazy..
( , Fri 17 Oct 2014, 15:22, Reply)