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===The [[Coronavirus]] mask example=== | ===The [[Coronavirus]] mask example=== | ||
A simple example: say you want to ensure all your customers to wear face masks in your shop, by means of a sign.<ref> | A simple example: say you want to ensure all your customers to wear face masks in your shop, by means of a sign.<ref>All this notwithstanding the [[JC]]’s aversion to [[signs]], which are by their nature cowardly, [[passive-aggressive]] and hectoring means of influencing behaviour, but still.</ref> | ||
Now, firstly, your object here is ''not'' “to prevent bare-faced customers coming into your shop”. You could achieve ''that'' by locking the door. If no-one comes in your shop there is no point having a door, or for that matter a shop, at all. | Now, firstly, your object here is ''not'' “to prevent bare-faced customers coming into your shop”. You could achieve ''that'' by locking the door. If no-one comes in your shop there is no point having a door, or for that matter a shop, at all. |