Good fun. I think, though, that precision in language might be a challenge. Some previous comments I concur. Over and above those, I was very strict not to infer anything outside the minimum of what was said. For example, “I was in bedroom from 10:00 to 10:15” does not imply that “I was not in the bedroom before or after that time”. Or, “I didn’t see anyone when I arrived” only means I saw no one in the destination room, not that there wasn’t someone in the kitchen (that I must have walked through) or the source room. Illogical that the murder could have happened up to 11:15, at exactly the same time that the police arrive—unless the victim phoned it in. These rules left ambiguity.