I am beginning to suspect that it is surprisingly common for intelligent, competent adults to somehow make it through the world for a few decades while missing some ordinary skill, like mailing a physical letter, folding a fitted sheet, depositing a check, or reading a bus schedule. Since these tasks are often presented atomically - or, worse, embedded implicitly into other instructions - and it is often possible to get around the need for them, this ignorance is not self-correcting. One can Google "how to deposit a check" and similar phrases, but the sorts of instructions that crop up are often misleading, rely on entangled and potentially similarly-deficient knowledge to be understandable, or are not so much instructions as they are tips and tricks and warnings for people who already know the basic procedure. Asking other people is more effective because they can respond to requests for clarification (and physically pointing at stuff is useful too), but embarrassing, since lacking these skills as an adult is stigmatized. (They are rarely even considered skills by people who have had them for a while.)
This seems like a bad situation. And - if I am correct and gaps like these are common - then it is something of a collective action problem to handle gap-filling without undue social drama. Supposedly, we're good at collective action problems, us rationalists, right? So I propose a thread for the purpose here, with the stipulation that all replies to gap announcements are to be constructive attempts at conveying the relevant procedural knowledge. No asking "how did you manage to be X years old without knowing that?" - if the gap-haver wishes to volunteer the information, that is fine, but asking is to be considered poor form.
(And yes, I have one. It's this: how in the world do people go about the supposedly atomic action of investing in the stock market? Here I am, sitting at my computer, and suppose I want a share of Apple - there isn't a button that says "Buy Our Stock" on their website. There goes my one idea. Where do I go and what do I do there?)
Even with an ordinary thermostat, cranking it up can be effective in some realistic situations. If some corners of the house take longer to heat up than the location of the thermostat, they'll reach the desired temperature faster if you let the thermostat itself and the rest of the house get a few degrees warmer first. Or to put it differently, scoffing at people who crank up the thermostat is justified only under the assumption that it measures the temperature of the whole house accurately, which is a pretty shaky assumption when you think about it.
As the moral of the story, even when your physics is guaranteed to be more accurate than folk physics, that's still not a reason to scoff at the conclusions of folk physics. The latter, bad as it is, has after all evolved for robust grappling with real-world problems, whereas any scientific model's connection with reality is delicately brittle.
That's an important lesson, generalizable to much more than just physics.
This general point is seriously deserving of a top-level post.