Board Thread:The Reference Desk/@comment-74.106.61.93-20130224211810/@comment-188432-20130225000743

The 13 thing is easily countered with other quotes which suggest 13 ain't the limit. It's at best a theory of how many regens a "proper" Time Lord has.

And of course, River isn't a "proper" Time Lord. We don't know what she is, and it's a bit hard to understand how she's really Time Lord at all. She's humanplus, not so much half Time Lord.