>This is the sort of combination of prefix and infix that
>works in some versions of Logo and not others. I believe
>Gary that it works in Microworlds, but if it were me, I'd
>make it more portable by saying
>
> output not (:thing1 = :thing2)
>
>or
>
> output not equal? :thing1 :thing2
>
>Either of those should work in any Logo parser.
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