To Have and Have Not (film) scenes, to underscore anti fascism in the story line of the film. A persistent myth is that a teenage Andy Williams, the future singing star, dubbed the singing for Bacall. According to authoritative sources, including Hawks and Bacall, this was not true. Williams and some female singers were tested to dub for Bacall because of fears she lacked the necessary vocal skills. But those fears were overshadowed by the desire to have Bacall do her own singing (perhaps championed by Bogart) despite her less than perfect vocal talent. This myth is disputed in "Leonard Maltin's Movie Guide" entry for this
Sleep and memory actually become worse at the task. The individuals that were allowed a 30-60 minute nap seemed to gain stabilization of the skill as no deterioration occurred. If allowed a 60-90 minute nap (REM sleep and slow-wave sleep), individuals displayed enhancement. Unlike the motor task, enhancement was not suppressed during the nocturnal sleep if the individual had napped earlier. In the situation of visual skill learning, naps have been shown to prevent wakeful deterioration and even enhance learning above and beyond enhancement occurring in nocturnal sleep. Shift workers who work throughout the night have been known to have far more accidents