Final answer:
In the context of robbery, the use of an instrument can make someone guilty of using force if the instrument is used to threaten or harm the victim.
Step-by-step explanation:
In the context of robbery, the use of an instrument can make someone guilty of using force if the instrument is used to threaten or harm the victim. For example, if a person uses a knife or a gun during a robbery to intimidate or injure someone, they can be considered guilty of using force. On the other hand, if the instrument is not used in a forceful manner during the commission of the robbery, then the person may not be guilty of using force.