The Unquestionable Truth (Part 1) is an EP by the American band Limp Bizkit, and their fifth major release overall. Released in 2005, it is the first release by the band to feature guitarist Wes Borland since he rejoined the group. He had left the band in 2001, and their previous album Results May Vary, was recorded without him. Drummer John Otto was absent for much of the album, and Sammy Siegler took over drumming duties for the band.

The EP differs from the band's established sound and lyrical subject matter by focusing on darker subjects and featuring a heavier, more experimental sound. The album's lyrics focus on subjects such as propaganda, Catholic sex abuse cases, terrorism and fame. Released without advertising and promotion, The Unquestionable Truth (Part 1) sold 37,000 copies during its first week in the United States, peaking at No. 24 on the Billboard 200. Reviews were mixed, but Borland's return to the band was praised, as was the new musical direction, which was considered to be ambitious.

After the release of the full-length album Gold Cobra in 2011, Limp Bizkit signed with Cash Money Records in early 2012. They had planned to release a sequel, titled The Unquestionable Truth (Part 2). However, the band left Cash Money Records in 2014, and never finished the sequel. The band eventually released the full-length album Still Sucks in 2021 instead.