The phrase "attribution argument" refers to a discussion or debate about who should be given credit or blame for something that has happened. Full definition
The skeptics have raised some valid issues (notably the PDO / AMO and solar); I hope that the «pause» will stimulate some systematic reconsideration of attribution arguments. (joannenova.com.au)
The IPCC attribution arguments (as opposed a rigorous scientific treatment of the question) operate under several constraints: the need to fit concerns for positive feedbacks, the need to not accidentally produce a very low value for sensitivity, the obligation to accommodate, and at times, exploit such unknowns as aerosols (very useful but also a pain), and so forth. (judithcurry.com)
But the key issue of societal relevance (not to mention the focus of IPCC detection and attribution arguments) is the realization of this heat on the Earth's surface. (realclimate.org)