I'm working through the logic-grid puzzles in the book called "Montague Island Mysteries" by R. Wayne Schmittberger. The particular puzzle I'm on is Puzzle 5.3 where breakfast guests choose food items from each of five food categories (juice -- orange juice, grapefruit juice, prune juice, tomato juice; omelet -- green chili, jalapeno, mushroom, seafood; pancake -- blueberry, pecan, etc.).
My question is about the wording convention used in the clues. For instance, in some clues, the puzzle states "The three guests who had orange juice...". So I know, clearly, that there are only three guests who chose orange juice. In other clues, the puzzle states "The one guest who had the jalapeno omelet...". So only one guest had the jalapeno omelet; no problem.
But here is the question: some clues also say "The guest who drank prune juice" or "the guest with boysenberry jam..." without saying "the one guest who..."
Is there any convention in the way these puzzles are written to know that "the guest who..." means "the one guest who..."? Is it safe to assume that if there were more than one guest with boysenberry jam, the clue would read "a guest" instead of "the guest"?
I'm a bit stuck right now but may be able to break through if it's safe to assume that a clue identifying "the guest" with a certain food item means that there is only one guest with that food item.