 Finally, Tsongkhapa has a robust explanation of the difference between true and false on the covering or conventional level. He denies any difference between a false object (a dream lottery ticket, for example) and a real one; as appearances, he asserts, both are equally false, only convention decides which is true. All phenomena equally lack truth. In Tsongkhapa's mature philosophy, therefore, all appearance is false––to appear is to appear as being truly what the appearance is of, and the principle of dependent origination precludes such truth from according with the way things actually are.