Hence the "something else but not necessarily God" answer. Any sufficiently advanced technology being indistinguishable from magic, the potential explanations for the simultaneous eradication of all cancer would be deity or super advanced alien race. From a practical standpoint, I don't know that the options are all that different.
Exactly. Therefore I define the other way around - rather than 'God can perform miracles'; 'whatever it is that performs miracles is God'