Q: In some nations, such as Canada and the United States, crossbows are not subject to any specific regulation, in most there are laws, which differ widely. Each jurisdiction has its own definition of a crossbow, and in some cases pistol-sized crossbows are treated differently. There may be minimum ages for possession, and sales of both crossbows and bolts may be restricted. Specific rules around hunting use are also common.
Can we conclude that do you need a permit to buy a crossbow?
A: no

Q: The most common incidence of interference occurs when a member of the offensive team physically hinders the defensive team, decreasing its chances to make an out or increasing the chance that a baserunner will advance. Whenever this offensive interference occurs, the ball becomes dead. If the interference was committed by a batter or a baserunner, that player is called out and all other runners must return to the bases they occupied at the time of the interference. If interference is committed by a runner with the obvious intent of preventing a double play, the batter-runner will be called out in addition to the runner who committed the interference. If interference is committed by the batter-runner before he or she reaches first base with the possible intent of preventing a double play, the runner closest to scoring is called out in addition to the batter-runner. If interference is committed by a retired runner or by some other member of the offensive team, the runner who is most likely to have been put out will be called out.
Can we conclude that is the ball dead when it hits a runner?
A: yes

Q: The address fulfills rules in Article II, Section 3 of the U.S. Constitution, requiring the President to periodically ''give to the Congress Information of the State of the Union, and recommend to their Consideration such measures as he shall judge necessary and expedient.'' During most of the country's first century, the President primarily only submitted a written report to Congress. After 1913, Woodrow Wilson, the 28th U.S. President, began the regular practice of delivering the address to Congress in person as a way to rally support for his agenda. With the advent of radio and television, the address is now broadcast live across the country on many networks.
Can we conclude that is the state of the union address mandated by the constitution?
A: yes

Q: Most seat belt laws in the United States are left to the states. However, the first seat belt law was a federal law, Title 49 of the United States Code, Chapter 301, Motor Vehicle Safety Standard, which took effect on January 1, 1968, that required all vehicles (except buses) to be fitted with seat belts in all designated seating positions. This law has since been modified to require three-point seat belts in outboard-seating positions, and finally three-point seat belts in all seating positions. Initially, seat belt use was voluntary. New York was the first state to pass a law which required vehicle occupants to wear seat belts, a law that came into effect on December 1, 1984. Officer Nicholas Cimmino of the Westchester County Department of Public Safety wrote the nation's first ticket for such violation.
Can we conclude that is it compulsory to wear seat belts in usa?
A:
yes