[racket] Little Schemer, lat?

As I see it, '() may not specifically be a lat, but it's not *not* a lat.
not not == is

Perhaps with a 3rd logical value we could declare it a "maybe" lat. That's
the same answer I would put in the truth table for implication

T T -> T
T F -> F
F T -> Maybe
F F -> Maybe

I know there are alternative logical systems, but I don't actually know any
of them, so sorry to all mathematicians I may have offended with the above.
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