Researcher: People with certain personality disorders have more theta brain waves than those without such disorders. But my data show that the amount of one' s theta brain waves increases while watching TV. So watching too much TV increases one' s risk of developing personality disorders. A questionable aspect of the reasoning above is that it ['draws a conclusion from an unrepresentative sample of data', 'infers that watching TV is a consequence of a personality disorder', 'takes correlation to imply a causal connection', 'fails to define the phrase "theta brain waves"']