What is a smoking gun? Where does the phrase come from?
A smoking gun is piece of incontrovertible incriminating evidence.
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Top 10 words with the most entries in the Oxford English Dictionary?
Here are the words with the most separate entries in the OED:
Most common spelling mistakes in English?
These are the five most common spelling errors in English:
What is Asperger's Syndrome? What is an ASD?
The terminology surrounding this area is confusing, partly for historical reasons.