not necessarily

In various computer languages, "!" means "not". E. g, 1 != 2. In elementary school, I was taught that "~" is a graphic "adjective" meaning "effectively," "about," "near," "circa," etc. E.g., this event will happen ~2012 means that if you had to pin the event to a specific year, 2012 would be your best bet.

So, to make a long story short, I propose that

!~

mean "not necessarily." Admittedly, "not necessarily" isn't a literal translation of the signs . . . but nothing is literal when it comes to the way people actually speak to one another. A language free of nonsensical or marginally-sensical colloquial phrases wouldn't be a language at all, but rather a system of codes.