An overview is given on three issues concerning the ways energy professionals and the public alike, talk, write, and think about how energy affects the way in which buildings are designed, operated, retrofitted and inhabitted. First, many statements and ideas commonly promoted as true in energy policy and building science have, at least, a weak basis as objectively true. Second, that despite the lack of a good basis in fact, such statements and ideas often guide the actions of both energy professionals and those to whom the information is provided. Third, how can researchers in energy and policy and building science, pay more attention to finding the truth by questioning their statements and assumptions.