It is the same translation as in Dhamma mirror in DN16: 他(he)就能(can)以自己(self)記說(declare to)自己(self)
I am thinking why is it call the Dhamma Mirror, it is like a mirror which one can look into and reflect own quality, if one process this, this, this … quality, then one can be sure that one is a sotapanna, without the need from other to tell you your attainment.
With Metta