Is the Sony cyberattack an act of war?

Both the White House and the Pentagon list intellectual property and identity theft as a form of cyber crime.

However, they do not spell out when a cyberattack is serious enough to constitute an act of war.  

The Wall Street Journal’s May 2011 article mentioned that “one idea gaining momentum at the Pentagon is the notion of ‘equivalence.’ If a cyber attack produces the death, damage, destruction or high-level disruption that a traditional military attack would cause, then it would be a candidate for a ‘use of force’ consideration, which could merit retaliation.”  

David Inserra, a research associate for homeland security and cybersecurity at The Heritage Foundation, told Breitbart News that the Sony cyberattack is not disruptive enough to merit an act of war or an act of cyber terrorism label.