ok.. lets go slowly here.. there is no bike NCT or anything like it so I wasn't suggesting the people who are fanatical about bikes should not be subject to your imaginary test
All I was saying is that HemmY got straight into trying to suggest that RTB was negligent about bike maintenance, and I pointed out that this is unlikely given the standard of bike he is cycling and his constant posting about his biking travails. It was a chain slip and the bike he is riding is a finely tuned instrument, it is unlikely he was cycling around with his derailleur out of sync, worn cassette or rings, stretched chain to that extent etc etc.