I want to ask this specifically to you Cecilly, because I think you're likely of the expertise to see right through this. Its more of a riddle:
In world war one, british helmets were upgraded from caps to metal helmets due to a large amount of head wounds from the debris of artillery shells. However, upon issuing the new helmets, the amount of head wounds skyrocketed five fold. The change was almost reverted, but someone realized an error, and the helmets were kept.
Any ideas what the error was?
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