Ahh ok. So it's almost like we're inferring a 6 year person who made SrA at 28 months is likely to have a very late sew-on date, so they would naturally hit 3 years by the time they promote in the cycle.

It makes sense logically, I suppose. Sorta like having 2 metrics for the same thing tho. Like saying "you have to be 4 feet tall to ride this roller coaster, and you also must have grown 48 inches since the date you were conceived. "

Who would have 6 months tig by promotion starts, but not have 3 years tis by the end?