aainslie

Just to be clear - the dive mentioned above was using VPM before the implementation of B. Profiles on VPM-B are more conservative than under pure VPM. And just as no-one dives the original Haldane or even Buhlmann, no one dives VPM.

So please let's compare apples to apples. Either one decides that for some strange purist reason one can ONLY consider the original version of models, in which case one should compare pure Buhlmann or even better, Haldane (NO GF's allowed) to the original VPM, OR one should compare VPM B to Buhlmann GF. Picking one's battles by comparing the original VPM to GF-modified Buhlmann makes no sense.

And on that point - so what if someone got bent on VPM? We all know that. We also know that Haldane and original Buhlmann have pretty high risk. That's why none of us use any of them.

On the issue of whether the change was justified empirically or theoretically - in most cases, science advances by using each to inform one's application and usage of the other. IMHO it's silly to argue whether B was modified for theoretic or empirical reasons.

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Andrew Ainslie