There's a large class of puzzles where a group of people, often described as perfect logicians, are put in a situation where they have to deduce things based on what they know, and what they know others know, and so on. Examples:
- Blue-eyed islanders
- Sum and product
- Cheryl's Birthday
- Some hat puzzles (not the team-strategy ones)
So far, only the blue-eyes puzzles have their own tag. I feel like there should be a tag that encompasses all of these, like meta-knowledge or common-knowledge (I personally prefer the former). I'd of course go through and do the retagging.
Does anyone disagree with this? Or have opinions about the tag name?