Whose definition of consensus is this? It's not the one the study used. They say the 93% are "convinced that humans have contributed to global warming." You don't get to come back and say their data doesn't support a particular claim when they're not making that claim. I'd maybe quibble with the word "convinced," given that a portion of the 93% said we need more evidence, even though they are leaning toward the opinion, but that's a semantic issue, not a data one. They make no claims about confidence level or that only those in the "mostly" category qualify, or whatever. In fact, given the way the answers are worded, someone could be in the 78% (believing that warming is mostly due to humans) but with low confidence and someone could be in the half & half category but with high confidence.