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What I was trying to point out with the BIC under a microscope observation was that one of the few logical (to me) outcomes of the double bevel, is improved edge retention. Because it doesn't make...

"I think it would be in BIC's interest to produce blades that cut very comfortably and dull rather quickly. I believe the days that engineers in large multinational firms were actually trying to...

This comparison deals with cutting in a line parallel to the edge, not perpendicular. I agree when severing a given fiber there is always a "field of stress" that develops as the edge forces it's way...

I think if a hanging strop is used, the slight deflection inherent to the stropping motion should be touching the second bevel, but maybe not with the same force as a traditional bevel.

Though,...

I have to disagree fundamentally with the comment about a double bevel not being as long lasting as a single, the raw physics at work dictate that a steeper bevel produces a more resilient edge.
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I will concur with this technique on the big wedges, the second bevel really speeds up those last few steps. I've been shaving with a handful of those old fat arse wedges for a few months and the...