http://nickyee.com/index-puzzles.html

I’d been aware of these posers for a while, but never worked them out. Finally, last night, after being reminded of their existance again, I managed to solve them. They’re really quite elegant as puzzles go — no semantic tricks ala “I can’t operate on this boy — he’s my son!”, just straight up logic.

No, I’m not going to tell you the solutions. Yes, I am a horrible bastard.