Here's an example from T.M. Scanlon's "What We Owe to Each Other", a philosophical book on morality I was reading yesterday:
"When I ask myself what reason the fact that an action would be wrong provides me with not to do it, my answer is that such an action would be one that I could not justify to others on grounds I could expect them to accept."
This sentence is actually key to what the entire book is about, but.... "what reason the fact that an action"? I mean even as programmers we are taught to break apart long boolean expressions.
It's kind of like garden path sentences but a more general syntactic ambiguity that smart people are more guilty of due to their need to explain complex subjects. Hard for a writer to recognize, because they know what they mean.