Formal Logic Formal logic deals with deductive reasoning and the validity of the inferences produced. For an argument to work, the conclusion must logically follow the premises and the premises must be true.
Vibe is the aura a person possess. The kind of vibes that a person emanates depends on his feelings. Every feeling has a frequency or energy. If you feel good, happy or comfortable while meeting someone you say that the person emanates positive vibes.
Incense means both to make angry and a stick that burns slowly and emits a strong smell. If your new college roommate burns incense in your tiny dorm room, you might get incensed and storm out. How can a word that means a substance that is burned for its sweet odor come to mean make very angry?