Elizabeth Warren actually said...

"When we can't describe even in the most general terms what will happen if you engage in a cyber attack against us, ... deterrence at that moment melts away to nothing."

"So I'm hearing you say be sure that they know what we're going to do."

"Are there other more achievable near-term technologies that we should be investing in right now to put us on the right path?"

"Our potential adversaries are more interested in challenging us through cheap and asymmetric means."