Paradox (What's on Your List?)

At first I thought,
a list of what nobody knows
would stay perpetually empty
for to add something to the list
you'd first need to know about it,
but once known it no longer belongs
on such a list.

At second thought
the list had far more potential;
all there is to do is ask questions,
to delve beyond the obvious.
There are plenty of things that we
know we don't know.

The fun part
(along with simply contriving such a list
like "is there such a thing as a Sasquatch?"
or "are we, as Seuss depicted, simply a Who?")
is getting to cross them off.

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On inspiration for this piece: This idea was pulled from Poetic Asides's 2015 April PAD Challenge: Day 29. "For today’s prompt, write a what nobody knows poem."