Last two posts have mentioned common sense but I was told, by a guy on my side, that because common sense cannot be defined you cannot use the term.
The case in question was a range of ink mixing machines we used to make. Basically a food mixer on steroids, large motor VDF drive paddle goes into a tub of ink and lathers it up. These had to gain CE to be sold in this country so we contacted the Derby Small Business Bureau for help as we were a member.
Guy comes round to help us, nice guy, very knowledgeable and in no way a jobs worth.
Asked how they worked, showed him and they had a spring cover went on the top of the tub to stop ink splashing.
He asked what stops you lifting the cover and putting your fingers in whilst running. My answer was common sense as the slightest dab of this stuff on your fingers and the missus would be walking round with green drawers for 3 months.
Was told we couldn't use common sense in the handbook as could not be defined.
Then knocked off and went into the house for a cup of coffee, ironically earlier that morning been down to Argos and bought a new kettle as the old one had packed in. So brand new Argos special complete with highly visable CE sticker sat there.
So filled it with cold water, called him to look at this and lifter the lid and stuck my hand in saying "Ouch". Then proceeded to poor said cold water all over by other hand in the sink, saying "ouch" again. then pointed to the CE sticker.
He looked at me, I looked at him, he said "Point taken, so if we change common sense in the handbook proof to "Do not stick fingers in the tub " I think we tick all the boxes and you can have your CE certificate.