"What's missing here, of course, is any definition of what impact 'is'. So how are academics supposed to work this out?"
"This article is about 'RCUK impact', not 'REF impact'. Just to confuse matters, RCUK and REF use different notions of 'impact'."
"Once the REF had been introduced, there were bound to be all kinds of sub-schemes to operationalize it. As there are operationalizations of astrology and the like."