Board Thread:General Discussion/@comment-2001:4CA0:0:F226:5DC3:F3C1:2652:DAA2-20170826174850/@comment-48285-20170828170623

How does one determine the "level" of such a techinque? I can understand that it's based on the Nen user's ability to maintain their aura but that brings me back to my question on how the "level" is determined. Is it like:

Nen User A: My Gyo is at level 10!

Nen User B: Well, my In is level 20 so you can't see it!

Sounds like someone can just make it up as they see fit.