An inconsistent triad is when three numbers or measurements don't match. It's like a math problem where you have three numbers but the answer isn't the same when you add or subtract them. For example, let's say you have three numbers: 2, 5 and 7. If you add them together, the answer is 14. But if you subtract them from each other you get a different answer - 0. That's an inconsistent triad because the two answers don't match.