something stirs and something tries, and starts to climb towards the light
Have been getting sufficiently vexed with people saying daft things online, or not bothering to do their homework before mouthing off, that blogging may resume sooner rather than later. However, actual mathematical posts (like a long-planned but infrequently revisted post on the general theme of parity arguments, signature and other invariants) will have to wait.
Next up, if I can get organized enough to write it, will be something on the off-topic theme of checking the secondary sources. Probable mentions of Bill Hartston and Susan Greenfield — there is a connection, I promise, though it’s tenuous.