I look forward to your detailed rebuttal.
It's Henke's attempt to rebut Humphries. And he doesn't seem to have relevant data to prove his point about pressure invalidating the data on zircons. All he has is some experimentation with argon, which is not helium, and mica, which is much softer and more porous than zircon, and wet experiment as opposed to dry. Ask him for a valid comparison of data in rebuttal, not me.
Cordially,