premise: The discography of Foo Fighters, an American rock band formed in 1994 by Dave Grohl, consists of nine studio albums, four extended plays (EPs), six video albums, and 36 singles. The current Foo Fighters line-up consists of Grohl (vocals and guitar), Taylor Hawkins (drums), Rami Jaffee (keyboard), Nate Mendel (bass), Chris Shiflett (guitar), and Pat Smear (guitar).
hypothesis: Nate Mendel and Taylor Hawkins do not play the same kind of instruments. 
reason: Nate plays the bass and Taylor plays the drums, so my statement that they don't play the same kind of instrument is correct (string vs. percussion). The computer doesn't understand. 