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Not sure how you determine a line of thinking from a question, but hey, I'll play!!!
IP?? Half the "IP" (and by "IP" I am assuming you mean intellectual property) has been reworded public domain, available for download, frequently from another certifying agency. Then I get the whole "but it's copyrighted material". Lets go do a look up and see how many have actually gone through the copyright process. As a general reference, I'd say pick up OW books from each agency and lets compare for differences. We continue to hear how existing agencies meet some oversight requirements for training. If so, how different can they be? Specific here say accusations from PSI-PCI stating the new VIP course from SDI is PSI IP. Of course, that was the rumor mill, but strong enough to lead to a smoke and fire scenario. Then when SDI said, go ahead, take us to court (rumor mill, once again) the public accusations dried up.
So the question about IP certainly can be questioned, now I guess it's a matter of determining his teaching capability. Kind of a shot in the dark here, but hey, that's arm chair legal. These are easy stones to toss. First, are only certified instructors good enough to teach? Not withstanding the obvious, sure, how about some cases? Lets see, most military divers, and a large number of commercial, dive without the standard certification process found in the recreational certification agencies. Many promote to instructor from within. Be curious to see the safety comparisons between the well certifying agencies and the private sector ones.
But then again, I'd be willing to be you knew all of this and just wanna sit there and poke the fire. Of course, that all speculative BS, kind of like your question, in the first place. LOL