John Cook, Dana Nuccitelli and others published a lengthy response to criticisms by Richard Tol. In it, they described their famous paper about a consensus on global warming as:

C13 classified abstracts of climate science papers based on the level of endorsement that most of the recent global warming is man-made (AGW, Categories 1–3)

But when discussing what the definition their paper would use, Dana Nuccitelli specifically said:

Category 2 is “Explicitly endorses but does not quantify (or minimize) AGW.” Thus it doesn’t require an assumption of >50%.

How can Category 2 not “require an assumption of >50%” human contribution if Categories 1-3 say “most of the recent global warming is man-made”?