Kinealy,
"Thirdly, the issue of culpability has been consistently avoided or denied in revisionist accounts."

She uses Revisionist in the same way that I do.
That is the usage in this context.

"How culpable were the British ministers of the 1840s? They are charged with having given inadequate, limited relief because of their commitment to a doctrine of laissez faire. However, given the scale of the problem and the acute nature of the crisis once the harvest had failed for a second time in 1846, there was little they could do."

Read more: http://www.fee.org/the_freeman/detail/lessons-of-history-the-great-irish-famine#ixzz2Z7fhxnXV

Robert Nielson.
The most controversial issue in Anglo-Irish affairs is the allegation that food was exported during the Famine. This was first claimed by Irish nationalists as a reason to end British rule and the Famine certainly put an end to the idea that Ireland would be a part of the United Kingdom for good. However, it is extraordinarily difficult to prove the claim true or false, and to my knowledge no one has. Records of exports simply weren't kept or have since been lost. It is certainly true that some food was exported, but there is no way of knowing how much or if it would have prevented the Famine. Food was also imported, though again, it is unknown where this outweighed the food that was exported. The starving Irish had little money so merchants naturally (in their mind) sold it abroad where they could get a better price. Had a ban on exports been put in place, lives would have been saved, but how many is unknown.
http://robertnielsen21.wordpress.com/2013/03/05/was-the-irish-famine-genocide/

Human limitations and timidity dominate
the story of the Great Famine, but of great and
deliberately imposed evil in high positions of
responsibility there is little evidence. The really great
evil lay in the totality of that social order which made
such a famine possible and which could tolerate, to the
extent it did, the sufferings and hardship caused by the failure of the potato crop.

http://www.iisresource.org/Documents/KS3_Famine_Interpretations.pdf