Allowing UCLA to test the B samples might have provided some PR value to the uniformed public, but until we see some noteworthy cases of science professionals at accredited laboratories busted for conspiring to frame athletes and falsify results, there is simply no legitimate reason to object to LNDD testing the B samples. For those inclined to latch onto conspiracy theories, even a second positive result at a different lab would be open to conspiratorial interpretations (e.g., LNDD sent a “spiked” sample to UCLA to cover their falsification of the A sample, the staff at UCLA falsified the results to cover for their colleagues in France, etc.). You’re kidding yourself if you think a variation the testing protocol would “remove the conspiracy aspect” in the minds of people who want to believe such things.
Given the decades-long pattern of widespread doping, cheating and lying among the ranks of professional cyclists, and the utter lack of any such pattern of fraud among science professionals at accredited testing laboratories, any reasonable person will know who is likely to be telling the truth in this case. I don’t think there is a test protocol in the world that would change the mind of anyone willing to buy into such crackpot ideas in the first place.