How is the sentence “the government has the right to require the wearing of helmets while operating or riding on a motorcycle because of the high rate of head injuries incurred in motorcycle accidents” a non sequitur?

This sentence refers to a general law that must be respected by everyone who operates or rides on motorcycles, and it is not well formulated, because of the use of the verb phrase "has the right to", as this phrase does not transmit the obligation and relevance of the whole statement. A better option would be: The government mandates the wearing of helmets...

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.  

who is marty in this situation?