Idea brainstormed while thinking about what properties water has that could make for a thematic puzzle.
I discarded an early idea featuring 10-letter answers extracting two letters each. These answers were ridiculously constrained, and also, it obscured the insight of binary extraction. I also discarded an idea where each answer had 6 letters, with the first letters A-G used for ordering. While it feels a little unsatisfying for all the metas to list the orders to use the puzzles in, adding an additional ordering step felt like it obscured the core insight of the puzzle.