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Rikard's avatar

Here's how I model expectations using math:

A 25 meter tall Nordic spruce, dead and dried-out but still standing is felled by gusts topping 30m/s. It lands at a 45 degree angle, its top third caught in a cleft in a birch tree and its bottom end a rotted stump lodged in 1½ meter of snow. The end touching the ground is ½ a meter in diameter.

How and where do you cut to to:

A) Dislodge the entire tree?

B) Do so without danger to yourself?

C) Using only manual tools.

The difference between my model and the ONS is, if you mess up when applying it, you personally /will/ get hurt.

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Lon Guyland's avatar

I wonder what would happen if you looked at the distribution of age-at-death (a generalized “life expectancy”) over time. If its central location is declining, then there’s “excess death”. No doubt insurance actuaries have such things, and have a powerful incentive to be correct.

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