>Counter example: broken ciphers in WW2 mostly kept secret until the mid 1970s. How's this a counterexample? We know about about lots of conspiracies from the

>Counter example: broken ciphers in WW2 mostly kept secret until the mid 1970s. How's this a counterexample? We know about about lots of conspiracies from the 1970s that weren't known at the time, but we're not finding out about any conspiracies to rig UK election counts – because there weren't any that succeeded to a meaningful extent. Your example shows that even top secret government conspiracies tend to come to light eventually.