The of the subject must be reasonable considering the factors of physical surroundings, physical contact, and the type and level of any threats.

The Detention  of the subject must be reasonable considering the factors of physical surroundings, physical contact, and the type and level of any threats.

Explanation:

Shop keeper's Privilege and the Merchant Privilege:As per the doctrine of the common law the shopkeeper or the merchant can detain and question a person if they have a doubt on the person that they have committed an illegal act.

The detention by the shopkeeper is considered proper if:

nigger, that word was originated for white folks   to keep black people under

and when black people use it, they know that's just how they greet each other

and when white folks use it, they know there's a double meaning under