What experiments can we run? We know that the afterlife
exists, and that it's a physical plane (or quasi-physical, if we assume that Jashin was involved as a deity/Outer Entity that we can enter without dying instantly --unlike the Out which is antithetical to human life, much in the same way that the void of space is. But we don't
really know anything about inter-planar/path(?) travel. Short of reading another summoning scroll --which the QMs have
heavily implied would kill Hazou --I'm not sure what we could do.
Maybe we could have Hazou take an arbitrary amount of levels in Technique Crafting/Hacking (as trained by Mari or Noda, or both) and then study the mechanics of the Summoning/Reverse-Summoning Technique? First with the Dogs and then again with Hazou's Shadow Clones to gather yet
more data points (Hazou-Clone to the Dogs, then experiments with Hazou just repeatedly summoning Hazou-Clone to observe how/why it happens)? We could then cross-reference all of that with Hazou's sealing knowledge (with Kagome lending his considerable amount of sealing knowledge as a supplement) and his instinctual grasp of the Out that seems to (occasionally) beat out even Scary-Old-for-a-Sealmaster-
Kagome?
(I view Hazou's grasp of sealing to be more
instinctual than Kagome's more sanitized, standardized approach. Kagome is like a pianist who learned the scales, rhythms, etc and uses that well-earned knowledge to craft incredible symphonies. I view Hazou's grasp of sealing to be more like an art form. To exaggerate Hazou's like a piano prodigy whose creativity lends itself to working outside of the traditional, well-established forms that have centuries' of trial-and-error behind them. Hazou's crafts masterworks and takes traditional methods and twisting them in knots to create impossible works of art.)
