Because humans are fallible, everything they do is liable to have errors. Some are small and can be fixed; some are large and can't. Somewhere in between these two conditions is the occasional small glitch, for which the perpetrator will not accept blame. This story centres on such a one. It tells of a seemingly simple pipework heating system to be installed in a Royal Naval Armaments Depot in Scotland for the Ministry of Defence. The name of the depot, its location and the characters in the story are fictitious. A junior consulting engineer is forced by his client (the M.O.D.) to reduce...