Sura 84:10 says that the lost people are given the Record (of their bad deeds) behind their back, but in Sura 69:25 it is given in their left hand.
Yusuf Ali's commentary states that their hands are tied behind their backs [where does he get that from?] and it is given into their left hand, behind their back ... but that's not what the Quran says, and a "harmonizing assumption" has to be made to resolve the problem.

A Muslim's Response by Randy Desmond
Date: Fri, 18 Oct 1996 14:12:14 PDT

Yusuf Ali assume the Qur'an does not conflict. His "harmonizing assumption" does not assume anything contradictory to the Qur'an and it is perfectly acceptable explanation.