Mike,

>>>...Or you could just use .NOT. or ! in front of the equality.
>>... or NOT, as in
>? NOT "A" = "B"
>
>Hmmm, isn't that what I said (ok, ok, the dots aren't needed, but its the same thing, I think)?

I lost the dots several years ago. :-)

Of course, the placement of the NOT or ! does matter, which was not clear from your post. These all will work:

? "A" != "B"
? ! "A" = "B"
? NOT "A" = "B"
? .NOT. "A" = "B"

but these NOT will:

? "A" NOT = "B"
? "A" .NOT. = "B"
? "A" ! = "B"