User blog comment:Vel!/Googology and well-defined-ness/@comment-4224897-20141007121620

Interestingly BEAF can be thought of as under a continuum with the grades of well-defined-ness:

Linear arrays: A

Dimensional arrays: A-

Tetrational arrays: B

Array of before SVO: C+

Array of after SVO: C

Legion arrays before {L,L} stuff: D+

Legiattic array of, lagions, and whatever the fuck else: D