There's an important step I forgot to include in this video! Even if the grid is complete and everything matches, you must check each statement against the grid to make sure only one of them is false. For example, if person A says something that isn't true and Person B also says something that doesn't match in the grid, your chosen liar is incorrect even though the grid can be completed without contradictions. To reveal the liar, only one person's statement must not match the grid. This rarely comes up but it can happen!
Thank you! I almost gave up on these puzzles because I couldn’t understand how to figure out who the liar is. Now I get it and am really enjoying solving the puzzles. I watched lots of videos, but this is the only one that made sense to me.
