Board Thread:Character Discussion/@comment-7526254-20160510162817/@comment-28162607-20171212170707

Primary canon (what is shown in-show) trumps secondary canon (what is said in interviews). 25-29 is roughly what was shown us in the show.

You can't say Mal's statement in 1x02 doesn't count because other, smaller things in season 1 were also retconned. By that logic, nothing in season 1 can be taken as canon.

Snow being 10 was also stated in canon (4x09, Snow says, very loudly "I....was...TEN")