1. Only one reading can be the original
2. Only the reading that best satisfies both the external and internal criteria can be the original (Not beyond the shadow of a doubt)
3. External criteria takes precedence over internal criteria
4. Internal criteria can never be the sole basis for decision
5. Greek MSS takes precedence over all MSS of other languages. (other non-Byzantine MSS that are older are actually listened to)
6. Rather than be counted, MSS should be weighed: age, particular traits, tendencies and consistency. Decision by the local principle looking at each passage afresh, not just follow one MSS. (1000 from a bad exemplar is outweighed by 10 from a great exemplar)
7. Just one MSS with a correct reading is only a theoretical possibility but not taken seriously
8. The reading that can best explain the derivation of the other forms is itself the most likely to be the original reading. Genealogical principle. Why would a scribe try to change the text? What would be likely? Shorter readings are more likely so usually favored.
9. Variants cannot be treated in isolation, must look at the whole context, or can construct a text that has never existed anywhere.
10. Lectio difficilior lectio potior –the more difficult reading is the more probable reading
11. Lectio bervior lectio potior –the shorter reading is the more probable reading
12. Get familiar with the NT MSS themselves | 
