Why do so many people believe they can think about more than one thing at a time? What effect do fast, multitasking computer systems like Unix have on such beliefs? Is this healthy or unhealthy? Do...

Why do so many people believe they can think about more than one thing at a time? What effect do fast, multitasking computer systems like Unix have on such beliefs? Is this healthy or unhealthy? Do you, personally, think it is okay to talk on the phone or text message while you are driving? What about when other people do it?