Four genuine masteries of specifics

The four genuine masteries of specifics (Wyl. so so yang dag pa rig pa bzhi) are:

1. genuine mastery of specifics of meaning (don so so yang dag pa rig pa bzhi)
2. genuine mastery of specifics of Dharma teachings (chos so so yang dag pa rig pa bzhi)
3. genuine mastery of specifics of language (nges tshig so so yang dag pa rig pa bzhi)
4. genuine mastery of specifics of confident and eloquent expression (spobs pa so so yang dag pa rig pa bzhi)

Source

RigpaWiki:Four genuine masteries of specifics