Here are a few examples of a must be false questions, then, which of the following must be false key words, too obvious, which cannot be true. If the statements above are true, that tells you you're doing some sort of inference question, because they're calling the paragraph statements rather than an argument or reasoning. And instead of asking us what must be true or what's most supported as a typical inference question would, this actually says which can't be true. This one feels a little bit more like logic games, where we are often asked each of the following could be true except, and we know to convert that into four of them could be true, one of them must be false. There's a software version of this that's sort of like the difference between must be true and most supported. Instead of flat out saying must be false, they'll just say it's the least compatible.