Kwyj1b0 (2757125) writes "I.B.M's Watson is headed to the Cleavland Clinic for training. Clinicians and students answer and correct Watson, in an attempt to crowdsource its education. One possible benefit is to help doctors keep up to date with incoming research." Link to Original Source
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"