With respect, spheroid, what you believe is as irrelevant to this as what Messrs. Wratten and Day believed, or even were in their own minds certain of.
The rules at the time were that unless 'No Possible Doubt' was the case, then the verdict imposed by them was contrary to the written rules. Others, including the BOI had a range of doubts, and time has only revealed more.
Let justice be done.