The Impossibility of Reason is the second studio album by the American heavy metal band Chimaira, released on May 13, 2003. It is the first album to feature Matt DeVries on rhythm guitar. The album is noted for its groove metal-oriented sound, especially when compared to the band's previous releases which were considered closer to the nu metal genre. Upon release, it debuted No. 117 on the Billboard 200 charts. To date the album has sold around 200,000 copies in the US.