We Prove To You:
      All Our Puzzles Are Interesting!

Let S be the set of uninteresting puzzles on our site:

Assume that S is not empty:

This means that there are some uninteresting puzzles on our site.
Then there also exists a least interesting puzzle.
Let P (member of S) be this least interesting puzzle:

Then we would be very interested to know which puzzle P is.
So this makes P a very interesting puzzle!
But we assumed that P was uninteresting (member of S).

Which leads to a contradiction!

This means that S can only be empty!

So: all puzzles on our site are interesting!

Another proof: our awards and visitors' reactions.

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