Malfeasance: "A wrongful or unlawful act."
Surplusage: "Redundant words in a statute or legal instrument; language that does not add meaning."
And....My favorite so far: Scintilla: "A spark or trace--'the standard is that there must be more than a scintilla of evidence.'"
That said, I shall continue my studies, hoping to avoid committing a malfeasance, surplusage, and coming to conclusions with only a scintilla of evidence.
(with limited time and resources, this is best picture I could find to describe my feelings over my increasing vocabulary)