Auditor: XYZ, a construction company, purchased 20 new trucks 3 years ago, and there is no record of any of those trucks being sold last year  Records indicate, however, that XYZ sold off all of its diesel-powered trucks last year
We can thus conclude that none of the 20 trucks purchased 3 years ago were diesel powered
XYZ no longer owns any trucks that it purchased more than 3 years ago.