Puzzle 217: Process of Illumination 16

Tomorrow is my birthday; as announced before, the event will be marked by a batch of special Evil Zingers (EZ's), the cruelest logic puzzles I have ever posted on this blog, and possibly the cruelest puzzles on the whole internet. I am very proud of the puzzles I have lined up for your solving torture. Be ready to really hurt your brain! Really! I'm not kidding.

Compared to the puzzles I'll being putting up tomorrow, this one's a walk in the park.

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