The impact of an event is a case-by-case issue. It's measured as it would be in any other environment.
To try to answer your question, I would offer that a cyber-event would now be considered or looked at like any other kind of kinetic event from a military perspective, and it could qualify for article 5 if the impact to the nation was deemed sufficient to invoke that policy. It's really not for me to comment what it would take to get there.
I don't disagree with you that it's the industries of our nations that are vulnerable to these kinds of attacks. I just want to clarify our mandate for you here today, which is that we engage to help and provide service to Canadians through the national defence institution, so that you have a good understanding of what to expect from us should something like that happen.