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A simple test can be negated (its meaning reversed) by inserting the letter N immediately before the test (after the /).

A logical expression in parentheses can be reversed by putting N before it.

Examples of negated tests:

$104/nv,

$1120/nvx9,

$120-121*5/n1..14,

$sa/n1..9,

$123-125/n'PJK',

$fred/nb,

$xbrand/ns,

$247/nc2,

$nt/n<6,

$total/n>100,

$mult/nm,

$wt/n0.7,

Example of negated expression:

n($104/v+$1120/vx9),

is the same as:

$104/nv.$1120/nvx9,