Praise then darkness, and creation unfinished

This afternoon at work was wrestling with a manuscript, on a level that leaves me thinking that the writer was either unwell, or really distracted, when she wrote the lesson in question. It included a paragraph that, hypothesizing a moon with a circular orbit, explained that the moon's kinetic energy would not change as it moved through its orbit, and neither would its kinetic energy. OK. The paragraph ended "Thus, KE=PE." I went "no, no, no" and realized that I had no idea of what she had meant to say. There were other careless bits in the physics, and a topic omitted that needs to be in there. I spoke to my helpful and sympathetic coworker, Chris; concluded that if we sent the lesson back for rewrite, I'd have to explain what was wrong with it, and between that and the first pass I'd done before finding the physics errors, I would have done most of the work; and sent my boss a note explaining all this and adding that I just wanted her to know that this had happened with this particular book. (The writer in question usually provides basically sound if long-winded copy.) I have fixed the broken physics, and first-drafted three paragraphs to fill the gap.

Then I went to the gym. I'm not, I think, 100% well yet, and two of the machines I like were out of order, but it wasn't a bad workout.

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