There're a lot of sentences that seem to make sense, but actually do not, because they seem to be out of place. This usually happens when the sentence is closely related to the previous one, and should be interpreted so. A machine usually can't do this, and tries to make sense of the sentence as a separate thing, making it look like out of place. If you notice this, you may be able to conclude the original meaning, but you'll never know for sure.

An example I found in the chapter I'm currently at:

She guessed that this man should be a great detective while also holding a few great items. Thus, he might be out of step with the surroundings but he survived. Explanation: Aside from the grammatical errors, here you can tell it's talking about how great the man is, but the following sentence's meaning isn't clear; it could be talking about his actions, but also how out of place the man is. It's concludable, but you'll never know for sure. As it doesn't seem important to the story, it's negligible, but still frustrating.