"Tout va très bien, Madame la Marquise"!
Despite some people were retired other teams had been working on Ariane4 V33 and on Ariane5... But they were focused on terrorism instead of science ! They had not an enough IT level of knowledge
and were leading hidden geopolitical aim...
Their was a confusion between the fact that both IRS do not work, and how that diagnostic is done -with a double crazy carry, followed by a long list of failures and loss of rigor with excess of optimism, trusting in the first positive statistic results instead of tracking the best proof.