Fire and building codes

What’s more primordial than fire? It’s easy to think that fire is a static threat, and defenses against it can be static. So it was surprising to see that changes in home design and contents are leading to fires spread much faster, and that the Canadian Commission on Building and Fire Codes is considering mandates for home sprinklers.

The CBC’s “Rise in fast-burning house fires heats up calls for sprinklers in homes” has a good discussion of the changing threat, the costs of mitigation, and the tradeoffs entailed.

Why is “Reply” Not the Strongest Signal?

So apparently my “friends” at are marking my email as junk today, with no explanation. They’re doing this to people who have sent me dozens of emails over the course of months or years.

Why does no spam filter seem to take repeated conversational turns into account? Is there a stronger signal that I want to engage with someone than…repeatedly engaging?

Celebrating Alt-Left Lawlessness

Lately, I’ve tried to stay away from the tire fire that American politics has become. I’m reasonably certain that I have more to contribute in other areas. But when the President tries to equivocate between those waving the Nazi flag and those protesting against them, we need to speak about what’s acceptable.

It ought to go without saying that when literal Nazis are on one side of a debate, the other side is in the right.

But apparently, that’s not obvious, so I felt I could share a plan for a march by the alt-left, under the ominous name of “Operation Overlord.” They were planning to overthrow the legitimate government all along the coast, and, through force, replace it with their own puppets.

More seriously, we can have disagreements about what’s best for the country, and it’s bad when we demonize those who disagree with us. Civilized society requires us to accept civil disagreement. It accepts that no one is privileged or disadvantaged by an accident of birth: “race, creed or color,” as the expression goes. But civil disagreement, by definition, precludes violence, advocacy of violence or threats of violence.

The Nazi flag is one such threat. Waving it has no purpose except declaring oneself outside society and at odds with the ideals and principles of good people everywhere.

If you’re in a crowd of Nazis, you should be asking why, and walking away.

If you have doubts about what a President should say, here’s a sample:

The Evolution of Ctenophore Brains

From his very first experiments, he could see that these animals were unrelated to jellyfish. In fact, they were profoundly different from any other animal on Earth.

Moroz reached this conclusion by testing the nerve cells of ctenophores for the neurotransmitters serotonin, dopamine and nitric oxide, chemical messengers considered the universal neural language of all animals. But try as he might, he could not find these molecules. The implications were profound.

Read “Aliens in our midst” at Aeon.