By challenging (finding another solution to) one parameter everybody takes for granted. I think of Skype challenging the phone paradigm (ie we have to pay for i

By challenging (finding another solution to) one parameter everybody takes for granted. I think of Skype challenging the phone paradigm (ie we have to pay for it, per minute, the further on Earth the more expensive). If you come accross a pain that people "accept" as part of life, there is room for power disruption (imo).