Final answer:
A person is justified in using force against another to protect themselves from the other person's use or attempted use of unlawful force, as long as their belief in the necessity of force is reasonable. Legal considerations and limitations exist for the use of force.
Step-by-step explanation:
In the context of self-defense, a person is justified in using force against another when and to the degree the actor reasonably believes the force is immediately necessary to protect themselves against the other person's use or attempted use of unlawful force.
For example, if someone is being physically attacked, they may use force to defend themselves, as long as their belief that doing so is necessary is reasonable in the given circumstances. Additionally, in some cases, the government is also authorized to use force to protect individuals through defensive measures.
It's important to note that there are legal considerations and limitations regarding the use of force, and the specifics can vary depending on the jurisdiction and situation.