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Agreed, i think that almost everything that has relied on diary entries has been shown to be unreliable, because people just don't fill them in as they go, and then when they fill them in they adjust the figures to reflect what they see as being correct. It probably surprises people that a good reasonably sized sample beats a larger poor sample.

A lot of academic time is difficult to categorise. Is chasing up the TA to see when the assignments will be marked teaching or admin? Is reading your blog work or recreation? While it interests me it is quite useful to see your thoughts on graphics for when I teach. At the moment it is keeping me away from the R package I'm developing.

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