But claig, Gove doesn't know more and the et al. is really misleading-this is a very personal crusade.
Gove knows there are things he cannot do, feels pissed by this (partly because daft smartypants people who did Ok at A-level make him feel so), and wants to make it so others must be able to. But that doesn't mean they are important things to be able to do. He wishes he had had a better grasp of the facts of history at school, so wants history to be more about chronological facts, but academic historians know good kids can get this themselves and want it to be made more demanding in terms of functional literacies in reading and writing. Employers want it to be more relevant to fact analysis and data handling. He thinks questions asking for set facts in waffly ways are harder and therefore demanding, but questions which demand you both know and use those facts are actually more so, even if they are more tightly structured. 'Hardness' mixes up a whole raft of issues: rigour, demand, knowledge itself and ability to access the question. Gove seems to many of us to have very personal reasons for where he puts the emphasis.
On topic, this is well worth a read:
ferretbrain.com/articles/article-861