Thread:KrytenKoro/@comment-35109290-20180716165043/@comment-134861-20180730122108

Again, it doesn't matter if the estimated ages or grades jive. All we can use is explicit statements of "character is X years old" or "character is in X grade".

From what you posted, we can use the grades from the animedia article, Tai's age from the trailer/website, the 02 ages from the animation chronicle, joe's 01 grade, and sora's 02 age. We would need to independently verify stuff like the last three, and include quote citations for all of these.

Anything else has to be left for the reader to head-canon. We cannot, ever, claim that something is an official statement if it's not.